Sets the input shape mask of window to the union of input shape masks
for all children of window, ignoring the input shape mask of window
itself. Contrast with gdk_window_merge_child_input_shapes() which includes
the input shape mask of window in the masks to be merged.
Since 2.10
Sets the input shape mask of window to the union of input shape masks for all children of window, ignoring the input shape mask of window itself. Contrast with gdk_window_merge_child_input_shapes() which includes the input shape mask of window in the masks to be merged. Since 2.10