">EnumerateSequence</a></li>
<li><a href="/v2.1/type/FlattenBidirectionalCollection/">FlattenBidirectionalCollection</a></li>
<li><a href="/v2.1/type/FlattenBidirectionalCollectionIndex/">FlattenBidirectionalCollectionIndex</a></li>
<li><a href="/v2.1/type/FlattenCollection/">FlattenCollection</a></li>
<li><a href="/v2.1/type/FlattenCollectionIndex/">FlattenCollectionIndex</a></li>
<li><a href="/v2.1/type/FlattenGenerator/">FlattenGenerator</a></li>
<li><a href="/v2.1/type/FlattenSequence/">FlattenSequence<