code: def set_break(self, filename, lineno):
      msg = self.idb.set_break(filename, lineno)
      return msg
  
imports: import reprlib
  import types
  from idlelib import debugger
label_desc: Use image node_id 9 for calling the IdbAdapter obj's underlying member method code with example usage: obj.set_break(filename, lineno) and returns: msg