code: function (token) {
        switch (token) {
          case this.lex.tagOpen:
            return this.lex.printIndicator;
  
          case this.lex.tagClose:
            return this.lex.tagOpen;
  
          case this.lex.printIndicator:
            return this.lex.tagClose;
        }
      }
docs: Get the next logical token Receives : token Returns  : token