`interface FastIterator<T>`

An iterator that extends the default Iterator interface with methods that give more performance.

Implemented by: FastIteratorBase<T>

Type parameters

Name	Description
T	the element type

Returns the next iterator value, or the given otherwise OptLazy value instead.

fastNext(): T | undefined;

fastNext<O>(otherwise: OptLazy<O>): T | O;

Returns the next IteratorResult.

next(): IteratorResult<T>;