docs: def unoptimize_scope(self, frame):
          """Disable Python optimizations for the frame."""
          # XXX: this is not that nice but it has no real overhead.  It
          # mainly works because python finds the locals before dead code
          # is removed.  If that breaks we have to add a dummy function
          # that just accepts the arguments and does nothing.
          if frame.identifiers.declared:
              self.writeline('%sdummy(%s)' % (
                  unoptimize_before_dead_code and 'if 0: ' or '',
                  ', '.join('l_' + name for name in frame.identifiers.declared)
              ))