replace

function replace(olddata:Gst.MiniObject, newdata:Gst.MiniObject):Boolean {
    // Gjs wrapper for gst_mini_object_replace()
}

Atomically modifies a pointer to point to a new mini-object. The reference count of olddata is decreased and the reference count of newdata is increased.

Either newdata and the value pointed to by olddata may be NULL.