docs: def should_stop_here(self, frame):
          """ Called by dispatch function to check wether debugger must stop at
          this frame.
          Note that we test 'step into' first to give a chance to 'stepOver' in
          case user click on 'stepInto' on a 'no call' line.
          """
          # TODO: Optimization => defines a set of modules / names where _tracer
          # is never registered. This will replace skip
          #if self.skip and self.is_skipped_module(frame.f_globals.get('__name__')):
          #    return False
  
          # step into
          if self.frame_calling and self.frame_calling==frame.f_back:
              return True
          # step over
          if frame==self.frame_stop:  # frame cannot be null
              return True
          # step out
          if frame==self.frame_return:  # frame cannot be null
              return True
          # suspend
          if self.frame_suspend:
              return True
  
          return False