The parent of the object. Please note, that when changing the 'parent' property, we don't emit #GObject::notify and #GstObject::deep-notify signals due to locking issues. In some cases one can use #GstBin::element-added or #GstBin::element-removed signals on the parent to achieve a similar effect.
Enables async message delivery support for bus watches, gst_bus_pop() and similar API. Without this only the synchronous message handlers are called.
This property is used to create the child element buses in #GstBin.