code: protected function validateType(): bool
      {
          if (!$this->dataHas('type')) {
              $this->memberRequired('/data', 'type');
              return false;
          }
  
          $value = $this->dataGet('type');
  
          if (!$this->validateTypeMember($value, '/data')) {
              return false;
          }
  
          if ($this->expectedType !== $value) {
              $this->resourceTypeNotSupported($value);
              return false;
          }
  
          return true;
      }
docs: Validate the resource type.
  
  @return bool