original_string: public function isValid()
      {
          $value = $this->field->getValue();
  
          // field is empty and its not required. It's thus valid.
          if ($value == '' && $this->required == false) {
              return true;
          }
  
          $parsedDate = date_parse($value);
  
          if ($parsedDate['warning_count'] == 0 &&
              $parsedDate['error_count'] == 0 &&
              isset($parsedDate['year']) &&
              isset($parsedDate['month'])
          ) {
              return true;
          }
  
          return false;
      }
code: public function isValid()
      {
          $value = $this->field->getValue();
  
          // field is empty and its not required. It's thus valid.
          if ($value == '' && $this->required == false) {
              return true;
          }
  
          $parsedDate = date_parse($value);
  
          if ($parsedDate['warning_count'] == 0 &&
              $parsedDate['error_count'] == 0 &&
              isset($parsedDate['year']) &&
              isset($parsedDate['month'])
          ) {
              return true;
          }
  
          return false;
      }
code_tokens: public function isValid ( ) { $ value = $ this -> field -> getValue ( ) ; // field is empty and its not required. It's thus valid. if ( $ value == '' && $ this -> required == false ) { return true ; } $ parsedDate = date_parse ( $ value ) ; if ( $ parsedDate [ 'warning_count' ] == 0 && $ parsedDate [ 'error_count' ] == 0 && isset ( $ parsedDate [ 'year' ] ) && isset ( $ parsedDate [ 'month' ] ) ) { return true ; } return false ; }
docstring: Check if the given field is valid or not. The date should be parsable by strtotime.
  
  @return boolean
docstring_tokens: Check if the given field is valid or not . The date should be parsable by strtotime .