public function canHandle($fieldName)
    {
        foreach ($this->sources as $source) {
            if ($source->canHandle($fieldName)) {
                return true;
            }
        }

        return false;
    }
public function canHandle($fieldName)
    {
        foreach ($this->sources as $source) {
            if ($source->canHandle($fieldName)) {
                return true;
            }
        }

        return false;
    }
@param string $fieldName

@return bool