original_string: protected function invalidOperator($operator)
      {
          return ! in_array(strtolower($operator), $this->operators, true) &&
                 ! in_array(strtolower($operator), $this->grammar->getOperators(), true);
      }
code: protected function invalidOperator($operator)
      {
          return ! in_array(strtolower($operator), $this->operators, true) &&
                 ! in_array(strtolower($operator), $this->grammar->getOperators(), true);
      }
code_tokens: protected function invalidOperator ( $ operator ) { return ! in_array ( strtolower ( $ operator ) , $ this -> operators , true ) && ! in_array ( strtolower ( $ operator ) , $ this -> grammar -> getOperators ( ) , true ) ; }
docstring: Determine if the given operator is supported.
  
  @param  string  $operator
  @return bool
docstring_tokens: Determine if the given operator is supported .