Gets back user data pointers stored via g_param_spec_set_qdata()
and removes the @data from @pspec without invoking its destroy()
function (if any was set). Usually, calling this function is only
required to update user data pointers with a destroy notifier.
Gets back user data pointers stored via g_param_spec_set_qdata() and removes the @data from @pspec without invoking its destroy() function (if any was set). Usually, calling this function is only required to update user data pointers with a destroy notifier.