Returns the type of the children supported by the container.
Note that this may return G_TYPE_NONE to indicate that no more children can be added, e.g. for a gtk.Paned which already has two children.
a GType
Returns the type of the children supported by the container.
Note that this may return G_TYPE_NONE to indicate that no more children can be added, e.g. for a gtk.Paned which already has two children.