code: def instructions(self):
          
  
          if self._instructions is None:
              # Compile the rule into an Instructions instance; we do
              # this lazily to amortize the cost of the compilation,
              # then cache that result for efficiency...
              self._instructions = parser.parse_rule(self.name, self.text)
  
          return self._instructions
docs: Retrieve the instructions for the rule.