Class Dompdf\Frame\FrameTreeIterator

`implements`	`Iterator`

Pre-order Iterator

Returns frames in preorder traversal order (parent then children)

Methods
`public`	`__construct(Frame $root)`	#
`public`	`rewind(): void` Implements `Iterator::rewind()`	#
`public`	`valid(): bool` Implements `Iterator::valid()`	#
`public`	`key(): int` Implements `Iterator::key()`	#
`public`	`current(): Frame` Implements `Iterator::current()`	#
`public`	`next(): void` Implements `Iterator::next()`	#