Appends the rich text targets registered with gtk.text_buffer.TextBuffer.registerSerializeFormat or gtk.text_buffer.TextBuffer.registerDeserializeFormat to the target list. All targets are added with the same info.
an ID that will be passed back to the application
if true, then deserializable rich text formats will be added, serializable formats otherwise.
a #GtkTextBuffer.
Appends the rich text targets registered with gtk.text_buffer.TextBuffer.registerSerializeFormat or gtk.text_buffer.TextBuffer.registerDeserializeFormat to the target list. All targets are added with the same info.