Sets our main struct and passes it to the parent class.
the main Gtk struct as a void*
Get the main Gtk struct
Appends @append_value to the GstValueArray in @value.
Appends @append_value to the GstValueArray in @value.
Gets the number of values contained in @value.
Gets the value that is a member of the array contained in @value and has the index @index.
Prepends @prepend_value to the GstValueArray in @value.
the main Gtk struct