code: def evaluate(self):
          
          if DEVELOP:
              internal_assert(not self.been_called, "inefficient reevaluation of action " + self.name + " with tokens", self.tokens)
              self.been_called = True
          evaluated_toks = evaluate_tokens(self.tokens)
          if logger.tracing:  # avoid the overhead of the call if not tracing
              logger.log_trace(self.name, self.original, self.loc, evaluated_toks, self.tokens)
          try:
              return _trim_arity(self.action)(
                  self.original,
                  self.loc,
                  evaluated_toks,
              )
          except CoconutException:
              raise
          except (Exception, AssertionError):
              traceback.print_exc()
              raise CoconutInternalException("error computing action " + self.name + " of evaluated tokens", evaluated_toks)
docs: Get the result of evaluating the computation graph at this node.