The IRawChildrenContainer interface defines the APIs for containers that
can return an IChildList that represents all their children.
This interface should be implemented by any container that has overridden
IChildList APIs such as numChildren and addChild()
method to manage only a subset of its actual children.
The mx.core.Container class, for example, has a set of content children
separate from the non-content children, such as borders, title bars,
and dividers.
Returns an IChildList representing all children.
This is used by FocusManager to find non-content children that may
still receive focus (for example, components in ControlBars).
Implementation public function get rawChildren():IChildList
