Module marker

Traits

• FusedIterator An iterator that always continues to yield None when exhausted.
• InPlaceIterable An iterator that when yielding an item will have taken at least one element from its underlying SourceIter.
• TrustedFused Same as FusedIterator
• TrustedLen An iterator that reports an accurate length using size_hint.
• TrustedStep A type that upholds all invariants of Step.