public Bin () : this (null) {}

[DllImport ("libgstreamer-0.10.dll") ]
static extern bool gst_bin_add (IntPtr raw, IntPtr element);

[DllImport ("libgobject-2.0-0.dll") ]
static extern IntPtr g_object_ref (IntPtr raw);

public bool Add (Gst.Element element) {
  bool raw_ret = gst_bin_add (Handle, element == null ? IntPtr.Zero : element.Handle);
  if (raw_ret) {
    // Incrmenting the refcount of the element.
    g_object_ref (element.Handle);
  }
  bool ret = raw_ret;
  return ret;
}

public bool Add (params Element[] elements) {
  if (elements == null) {
    return false;
  }

  foreach (Element element in elements) {
    if (element == null || !Add (element)) {
      return false;
    }
  }

  return true;
}

public bool Remove (params Element[] elements) {
  if (elements == null) {
    return false;
  }

  foreach (Element element in elements) {
    if (element == null || !Remove (element)) {
      return false;
    }
  }

  return true;
}

public Gst.Element GetByInterface (System.Type type) {
  if (!type.IsSubclassOf (typeof (Gst.GLib.GInterfaceAdapter)))
    return null;

  Gst.GLib.GType t = (Gst.GLib.GType) type;

  return GetByInterface (t);
}

public IEnumerable GetAllByInterface (System.Type type) {
  if (!type.IsSubclassOf (typeof (Gst.GLib.GInterfaceAdapter)))
    return null;

  Gst.GLib.GType t = (Gst.GLib.GType) type;

  return GetAllByInterface (t);
}