code: public function has(string $name, string $locale = null, bool $checkLinksAreResolved = true): bool
      {
          $field = $this->sys->getContentType()->getField($name, true);
  
          if (!$field) {
              return false;
          }
  
          if (!\array_key_exists($field->getId(), $this->fields)) {
              return false;
          }
  
          try {
              $result = $this->getUnresolvedField($field, $locale);
              if ($checkLinksAreResolved) {
                  $this->resolveFieldLinks($result, $locale);
              }
          } catch (\Exception $exception) {
              return false;
          }
  
          return true;
      }
docs: Checks whether the current entry has a field with a certain ID.
  
  @param string      $name
  @param string|null $locale
  @param bool        $checkLinksAreResolved
  
  @return bool