#root::data::Iterator
TakeWhile root/data/Iterator.vi:193
struct TakeWhile[I, F](...);
iterator root/data/Iterator.vi:196
impl iterator[I, T, F; Iterator[I, T], Drop[I], Drop[T], Fork[F], Drop[F], Fn[F, (&T,), Bool]]: Iterator[TakeWhile[I, F], T];