Get method documentation [Android Documentation]

Indicates whether this duplicates its drawable state from its parent.

Set method documentation [Android Documentation]

Enables or disables the duplication of the parent's state into this view. When duplication is enabled, this view gets its drawable state from its parent rather than from its own internal properties.

Note: in the current implementation, setting this property to true after the view was added to a ViewGroup might have no effect at all. This property should always be used from XML or set to true before adding this view to a ViewGroup.

Note: if this view's parent addStateFromChildren property is enabled and this property is enabled, an exception will be thrown.

Note: if the child view uses and updates additionnal states which are unknown to the parent, these states should not be affected by this method.