Returns the GtkSourceUndoManager associated with the buffer, see gtk_source_buffer_set_undo_manager(). The returned object should not be unreferenced by the user.
the GtkSourceUndoManager associated with the buffer, or NULL. [transfer none]
See Implementation
Returns the GtkSourceUndoManager associated with the buffer, see gtk_source_buffer_set_undo_manager(). The returned object should not be unreferenced by the user.