diff --git a/src/async/impl.ts b/src/async/impl.ts
index 9e64279..d8b0d9f 100644
--- a/src/async/impl.ts
+++ b/src/async/impl.ts
@@ -1300,7 +1300,7 @@ export class ConcatAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class DistinctAsyncSequence<T> extends BaseAsyncSequence<T> {
+class DistinctAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #equater: MaybeAsyncEquater<T> | undefined;
 
@@ -1322,7 +1322,7 @@ export class DistinctAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class DistinctByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
+class DistinctByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #selector: MaybeAsyncConverter<T, U>;
   readonly #equater: MaybeAsyncEquater<U> | undefined;
@@ -1348,7 +1348,7 @@ export class DistinctByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   }
 }
 
-export class FilterAsyncSequence<T> extends BaseAsyncSequence<T> {
+class FilterAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #predicate: MaybeAsyncPredicate<T>;
 
@@ -1368,7 +1368,7 @@ export class FilterAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class FlatMapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
+class FlatMapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
   readonly #sequence: AsyncSequence<T>;
   readonly #converter: MaybeAsyncConverter<T, MaybeAsyncIterable<U>>;
 
@@ -1386,7 +1386,7 @@ export class FlatMapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
   }
 }
 
-export class IndexedAsyncSequence<T> extends BaseAsyncSequence<[number, Awaited<T>]> {
+class IndexedAsyncSequence<T> extends BaseAsyncSequence<[number, Awaited<T>]> {
   readonly #sequence: AsyncSequence<T>;
 
   constructor(sequence: AsyncSequence<T>) {
@@ -1404,7 +1404,7 @@ export class IndexedAsyncSequence<T> extends BaseAsyncSequence<[number, Awaited<
   }
 }
 
-export class MapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
+class MapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
   readonly #sequence: AsyncSequence<T>;
   readonly #converter: MaybeAsyncConverter<T, U>;
 
@@ -1426,7 +1426,7 @@ export class MapperAsyncSequence<T, U> extends BaseAsyncSequence<U> {
   }
 }
 
-export class SkipWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
+class SkipWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #predicate: MaybeAsyncPredicate<T>;
 
@@ -1459,7 +1459,7 @@ export class SkipWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class SkipLastAsyncSequence<T> extends BaseAsyncSequence<T> {
+class SkipLastAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #n: number;
 
@@ -1500,7 +1500,7 @@ export class SkipLastAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class SkipAsyncSequence<T> extends BaseAsyncSequence<T> {
+class SkipAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #n: number;
 
@@ -1532,7 +1532,7 @@ export class SkipAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class TakeWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
+class TakeWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #predicate: MaybeAsyncPredicate<T>;
 
@@ -1554,7 +1554,7 @@ export class TakeWhileAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class TakeLastAsyncSequence<T> extends BaseAsyncSequence<T> {
+class TakeLastAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #n: number;
 
@@ -1581,7 +1581,7 @@ export class TakeLastAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class TakeAsyncSequence<T> extends BaseAsyncSequence<T> {
+class TakeAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #n: number;
 
@@ -1614,13 +1614,13 @@ export class TakeAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class OrderAsyncSequence<T> extends BaseOrderedAsyncSequence<T> {
+class OrderAsyncSequence<T> extends BaseOrderedAsyncSequence<T> {
   constructor(sequence: AsyncSequence<T>, descending: boolean, sorter?: MaybeAsyncComparer<T>) {
     super(sequence, sorter ?? defaultArrayComparer, descending);
   }
 }
 
-export class OrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T> {
+class OrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T> {
   constructor(sequence: AsyncSequence<T>, descending: boolean, selector: MaybeAsyncConverter<T, U>, sorter?: MaybeAsyncComparer<U>) {
     super(sequence, OrderByAsyncSequence.#createSorter(selector, sorter), descending);
   }
@@ -1631,13 +1631,13 @@ export class OrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T> {
   }
 }
 
-export class ThenOrderAsyncSequence<T> extends BaseOrderedAsyncSequence<T> {
+class ThenOrderAsyncSequence<T> extends BaseOrderedAsyncSequence<T> {
   constructor(sequence: OrderedAsyncSequence<T>, descending: boolean, sorter?: MaybeAsyncComparer<T>) {
     super(sequence, combineAsyncComparers(sequence.comparer ?? defaultArrayComparer, sorter ?? defaultArrayComparer), descending);
   }
 }
 
-export class ThenOrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T> {
+class ThenOrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T> {
   constructor(sequence: OrderedAsyncSequence<T>, descending: boolean, selector: MaybeAsyncConverter<T, U>, sorter?: MaybeAsyncComparer<U>) {
     super(sequence, ThenOrderByAsyncSequence.#createCombinedSorter(sequence.comparer, selector, sorter), descending);
   }
@@ -1649,7 +1649,7 @@ export class ThenOrderByAsyncSequence<T, U> extends BaseOrderedAsyncSequence<T>
   }
 }
 
-export class AppendAsyncSequence<T> extends BaseAsyncSequence<T> {
+class AppendAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #obj: T;
 
@@ -1671,7 +1671,7 @@ export class AppendAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class PrependAsyncSequence<T> extends BaseAsyncSequence<T> {
+class PrependAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #obj: T;
 
@@ -1693,7 +1693,7 @@ export class PrependAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class PeekAsyncSequence<T> extends BaseAsyncSequence<T> {
+class PeekAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #action: MaybeAsyncAction<T>;
 
@@ -1716,7 +1716,7 @@ export class PeekAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class ZippedAsyncSequence<T, U> extends BaseAsyncSequence<[Awaited<T>, Awaited<U>]> {
+class ZippedAsyncSequence<T, U> extends BaseAsyncSequence<[Awaited<T>, Awaited<U>]> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<U>;
 
@@ -1751,7 +1751,7 @@ export class ZippedAsyncSequence<T, U> extends BaseAsyncSequence<[Awaited<T>, Aw
   }
 }
 
-export class UnionAsyncSequence<T> extends BaseAsyncSequence<T> {
+class UnionAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #equater: MaybeAsyncEquater<T> | undefined;
@@ -1783,7 +1783,7 @@ export class UnionAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class UnionByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
+class UnionByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #selector: MaybeAsyncConverter<T, U>;
@@ -1817,7 +1817,7 @@ export class UnionByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   }
 }
 
-export class ExceptAsyncSequence<T> extends BaseAsyncSequence<T> {
+class ExceptAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #equater: MaybeAsyncEquater<T> | undefined;
@@ -1847,7 +1847,7 @@ export class ExceptAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class ExceptByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
+class ExceptByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #selector: MaybeAsyncConverter<T, U>;
@@ -1879,7 +1879,7 @@ export class ExceptByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   }
 }
 
-export class IntersectAsyncSequence<T> extends BaseAsyncSequence<T> {
+class IntersectAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #equater: MaybeAsyncEquater<T> | undefined;
@@ -1909,7 +1909,7 @@ export class IntersectAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class IntersectByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
+class IntersectByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   readonly #first: AsyncSequence<T>;
   readonly #second: AsyncSequence<T>;
   readonly #selector: MaybeAsyncConverter<T, U>;
@@ -1941,7 +1941,7 @@ export class IntersectByAsyncSequence<T, U> extends BaseAsyncSequence<T> {
   }
 }
 
-export class ReversedAsyncSequence<T> extends BaseAsyncSequence<T> {
+class ReversedAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
 
   constructor(sequence: AsyncSequence<T>) {
@@ -1963,7 +1963,7 @@ export class ReversedAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class GroupByAsyncSequence<TElement, TKey, TResult> extends BaseAsyncSequence<GroupedAsyncSequence<TKey, TResult>> {
+class GroupByAsyncSequence<TElement, TKey, TResult> extends BaseAsyncSequence<GroupedAsyncSequence<TKey, TResult>> {
   readonly #sequence: AsyncSequence<TElement>;
   readonly #keySelector: MaybeAsyncConverter<TElement, TKey>;
   readonly #elementSelector: MaybeAsyncConverter<TElement, TResult>;
@@ -1998,7 +1998,7 @@ export class GroupByAsyncSequence<TElement, TKey, TResult> extends BaseAsyncSequ
   }
 }
 
-export class ChunkedAsyncSequence<T> extends BaseAsyncSequence<T[]> {
+class ChunkedAsyncSequence<T> extends BaseAsyncSequence<T[]> {
   readonly #sequence: AsyncSequence<T>;
   readonly #size: number;
 
@@ -2032,7 +2032,7 @@ export class ChunkedAsyncSequence<T> extends BaseAsyncSequence<T[]> {
   }
 }
 
-export class JoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseAsyncSequence<TResult> {
+class JoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseAsyncSequence<TResult> {
   readonly #first: AsyncSequence<TOuter>;
   readonly #second: AsyncSequence<TInner>;
   readonly #firstKeySelector: MaybeAsyncConverter<TOuter, TKey>;
@@ -2066,7 +2066,7 @@ export class JoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseAsyncS
   }
 }
 
-export class GroupJoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseAsyncSequence<TResult> {
+class GroupJoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseAsyncSequence<TResult> {
   readonly #first: AsyncSequence<TOuter>;
   readonly #second: AsyncSequence<TInner>;
   readonly #firstKeySelector: MaybeAsyncConverter<TOuter, TKey>;
@@ -2108,7 +2108,7 @@ export class GroupJoinAsyncSequence<TOuter, TInner, TKey, TResult> extends BaseA
   }
 }
 
-export class RemoveAsyncSequence<T> extends BaseAsyncSequence<T> {
+class RemoveAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   readonly #obj: T;
   readonly #all: boolean;
@@ -2143,7 +2143,7 @@ export class RemoveAsyncSequence<T> extends BaseAsyncSequence<T> {
   }
 }
 
-export class CacheAsyncSequence<T> extends BaseAsyncSequence<T> {
+class CacheAsyncSequence<T> extends BaseAsyncSequence<T> {
   readonly #sequence: AsyncSequence<T>;
   #cache: T[] | undefined;
 
diff --git a/src/sync/impl.ts b/src/sync/impl.ts
index 2bddb09..01155cd 100644
--- a/src/sync/impl.ts
+++ b/src/sync/impl.ts
@@ -1472,7 +1472,7 @@ export class ConcatSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class DistinctSequence<T> extends BaseSequence<T> {
+class DistinctSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #equater: Equater<T> | undefined;
 
@@ -1498,7 +1498,7 @@ export class DistinctSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class DistinctBySequence<T, U> extends BaseSequence<T> {
+class DistinctBySequence<T, U> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #selector: Converter<T, U>;
   readonly #equater: Equater<U> | undefined;
@@ -1526,7 +1526,7 @@ export class DistinctBySequence<T, U> extends BaseSequence<T> {
   }
 }
 
-export class WhereSequence<TElement, TFiltered extends TElement> extends BaseSequence<TFiltered> {
+class WhereSequence<TElement, TFiltered extends TElement> extends BaseSequence<TFiltered> {
   readonly #sequence: Sequence<TElement>;
   readonly #predicate: FilterPredicate<TElement, TFiltered>;
 
@@ -1550,7 +1550,7 @@ export class WhereSequence<TElement, TFiltered extends TElement> extends BaseSeq
   }
 }
 
-export class SelectManySequence<T, U> extends BaseSequence<U> {
+class SelectManySequence<T, U> extends BaseSequence<U> {
   readonly #sequence: Sequence<T>;
   readonly #converter: Converter<T, Iterable<U>>;
 
@@ -1568,7 +1568,7 @@ export class SelectManySequence<T, U> extends BaseSequence<U> {
   }
 }
 
-export class IndexedSequence<T> extends BaseSequence<[number, T]> {
+class IndexedSequence<T> extends BaseSequence<[number, T]> {
   readonly #sequence: Sequence<T>;
 
   constructor(sequence: Sequence<T>) {
@@ -1594,7 +1594,7 @@ export class IndexedSequence<T> extends BaseSequence<[number, T]> {
   }
 }
 
-export class SelectSequence<T, U> extends BaseSequence<U> {
+class SelectSequence<T, U> extends BaseSequence<U> {
   readonly #sequence: Sequence<T>;
   readonly #converter: Converter<T, U>;
 
@@ -1620,7 +1620,7 @@ export class SelectSequence<T, U> extends BaseSequence<U> {
   }
 }
 
-export class SkipWhileSequence<T> extends BaseSequence<T> {
+class SkipWhileSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #predicate: Predicate<T>;
 
@@ -1649,7 +1649,7 @@ export class SkipWhileSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class SkipLastSequence<T> extends BaseSequence<T> {
+class SkipLastSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #n: number;
 
@@ -1694,7 +1694,7 @@ export class SkipLastSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class SkipSequence<T> extends BaseSequence<T> {
+class SkipSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #n: number;
 
@@ -1730,7 +1730,7 @@ export class SkipSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class TakeWhileSequence<T> extends BaseSequence<T> {
+class TakeWhileSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #predicate: Predicate<T>;
 
@@ -1756,7 +1756,7 @@ export class TakeWhileSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class TakeLastSequence<T> extends BaseSequence<T> {
+class TakeLastSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #n: number;
 
@@ -1787,7 +1787,7 @@ export class TakeLastSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class TakeSequence<T> extends BaseSequence<T> {
+class TakeSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #n: number;
 
@@ -1824,13 +1824,13 @@ export class TakeSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class OrderSequence<T> extends BaseOrderedSequence<T> {
+class OrderSequence<T> extends BaseOrderedSequence<T> {
   constructor(sequence: Sequence<T>, descending: boolean, sorter?: Comparer<T>) {
     super(sequence, sorter, descending);
   }
 }
 
-export class OrderBySequence<T, U> extends BaseOrderedSequence<T> {
+class OrderBySequence<T, U> extends BaseOrderedSequence<T> {
   constructor(sequence: Sequence<T>, descending: boolean, selector: Converter<T, U>, sorter?: Comparer<U>) {
     super(sequence, OrderBySequence.#createSorter(selector, sorter), descending);
   }
@@ -1841,13 +1841,13 @@ export class OrderBySequence<T, U> extends BaseOrderedSequence<T> {
   }
 }
 
-export class ThenOrderSequence<T> extends BaseOrderedSequence<T> {
+class ThenOrderSequence<T> extends BaseOrderedSequence<T> {
   constructor(sequence: OrderedSequence<T>, descending: boolean, sorter?: Comparer<T>) {
     super(sequence, combineComparers(sequence.comparer ?? defaultArrayComparer, sorter ?? defaultArrayComparer), descending);
   }
 }
 
-export class ThenOrderBySequence<T, U> extends BaseOrderedSequence<T> {
+class ThenOrderBySequence<T, U> extends BaseOrderedSequence<T> {
   constructor(sequence: OrderedSequence<T>, descending: boolean, selector: Converter<T, U>, sorter?: Comparer<U>) {
     super(sequence, ThenOrderBySequence.#createCombinedSorter(sequence.comparer, selector, sorter), descending);
   }
@@ -1859,7 +1859,7 @@ export class ThenOrderBySequence<T, U> extends BaseOrderedSequence<T> {
   }
 }
 
-export class AppendSequence<T> extends BaseSequence<T> {
+class AppendSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #obj: T;
 
@@ -1885,7 +1885,7 @@ export class AppendSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class PrependSequence<T> extends BaseSequence<T> {
+class PrependSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #obj: T;
 
@@ -1911,7 +1911,7 @@ export class PrependSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class PeekSequence<T> extends DelegatedSequence<T> {
+class PeekSequence<T> extends DelegatedSequence<T> {
   readonly #action: Action<T>;
 
   constructor(sequence: Sequence<T>, action: Action<T>) {
@@ -1928,7 +1928,7 @@ export class PeekSequence<T> extends DelegatedSequence<T> {
   }
 }
 
-export class ZippedSequence<T, U> extends BaseSequence<[T, U]> {
+class ZippedSequence<T, U> extends BaseSequence<[T, U]> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<U>;
 
@@ -1967,7 +1967,7 @@ export class ZippedSequence<T, U> extends BaseSequence<[T, U]> {
   }
 }
 
-export class UnionSequence<T> extends BaseSequence<T> {
+class UnionSequence<T> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #equater: Equater<T> | undefined;
@@ -2000,7 +2000,7 @@ export class UnionSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class UnionBySequence<T, U> extends BaseSequence<T> {
+class UnionBySequence<T, U> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #selector: Converter<T, U>;
@@ -2035,7 +2035,7 @@ export class UnionBySequence<T, U> extends BaseSequence<T> {
   }
 }
 
-export class ExceptSequence<T> extends BaseSequence<T> {
+class ExceptSequence<T> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #equater: Equater<T> | undefined;
@@ -2067,7 +2067,7 @@ export class ExceptSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class ExceptBySequence<T, U> extends BaseSequence<T> {
+class ExceptBySequence<T, U> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #selector: Converter<T, U>;
@@ -2101,7 +2101,7 @@ export class ExceptBySequence<T, U> extends BaseSequence<T> {
   }
 }
 
-export class IntersectSequence<T> extends BaseSequence<T> {
+class IntersectSequence<T> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #equater: Equater<T> | undefined;
@@ -2133,7 +2133,7 @@ export class IntersectSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class IntersectBySequence<T, U> extends BaseSequence<T> {
+class IntersectBySequence<T, U> extends BaseSequence<T> {
   readonly #first: Sequence<T>;
   readonly #second: Sequence<T>;
   readonly #selector: Converter<T, U>;
@@ -2167,7 +2167,7 @@ export class IntersectBySequence<T, U> extends BaseSequence<T> {
   }
 }
 
-export class ReversedSequence<T> extends BaseSequence<T> {
+class ReversedSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
 
   constructor(sequence: Sequence<T>) {
@@ -2197,7 +2197,7 @@ export class ReversedSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class GroupBySequence<TElement, TKey, TResult> extends BaseSequence<GroupedSequence<TKey, TResult>> {
+class GroupBySequence<TElement, TKey, TResult> extends BaseSequence<GroupedSequence<TKey, TResult>> {
   readonly #sequence: Sequence<TElement>;
   readonly #keySelector: Converter<TElement, TKey>;
   readonly #elementSelector: Converter<TElement, TResult>;
@@ -2236,7 +2236,7 @@ export class GroupBySequence<TElement, TKey, TResult> extends BaseSequence<Group
   }
 }
 
-export class ChunkedSequence<T> extends BaseSequence<T[]> {
+class ChunkedSequence<T> extends BaseSequence<T[]> {
   readonly #sequence: Sequence<T>;
   readonly #size: number;
 
@@ -2274,7 +2274,7 @@ export class ChunkedSequence<T> extends BaseSequence<T[]> {
   }
 }
 
-export class JoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequence<TResult> {
+class JoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequence<TResult> {
   readonly #first: Sequence<TOuter>;
   readonly #second: Sequence<TInner>;
   readonly #firstKeySelector: Converter<TOuter, TKey>;
@@ -2316,7 +2316,7 @@ export class JoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequence<TR
   }
 }
 
-export class GroupJoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequence<TResult> {
+class GroupJoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequence<TResult> {
   readonly #first: Sequence<TOuter>;
   readonly #second: Sequence<TInner>;
   readonly #firstKeySelector: Converter<TOuter, TKey>;
@@ -2365,7 +2365,7 @@ export class GroupJoinSequence<TOuter, TInner, TKey, TResult> extends BaseSequen
   }
 }
 
-export class RemoveSequence<T> extends BaseSequence<T> {
+class RemoveSequence<T> extends BaseSequence<T> {
   readonly #sequence: Sequence<T>;
   readonly #obj: T;
   readonly #all: boolean;
@@ -2404,7 +2404,7 @@ export class RemoveSequence<T> extends BaseSequence<T> {
   }
 }
 
-export class CacheSequence<T> extends DelegatedSequence<T> {
+class CacheSequence<T> extends DelegatedSequence<T> {
   #cached = false;
 
   constructor(sequence: Sequence<T>) {