method
takeWhile

Iterable<E> takeWhile(
bool test(E value)
)

Returns a lazy iterable of the leading elements satisfying [test].

The filtering happens lazily. Every new iterator of the returned iterable starts iterating over the elements of this.

The elements can be computed by stepping through [iterator] until an element is found where test(element) is false. At that point, the returned iterable stops (its moveNext() returns false).