# Method GTK2.SourceBuffer()->undo()

Method undo

  ``GTK2.SourceBuffer` undo()`

Description

  Undoes the last user action which modified the buffer. Use can_undo() to check whether a call to this function will have any effect.

  Actions are defined as groups of operations between a call to GTK2.TextBuffer->begin_user_action() and GTK2.TextBuffer->end_user_action(), or sequences of similar edits (inserts or deletes) on the same line.