private function getFieldTypeNode($type, $fieldName)
    {
        $fieldNode = $this->getFieldNode($type, $fieldName);

        return $fieldNode ? $fieldNode->type : null;
    }
private function getFieldTypeNode($type, $fieldName)
    {
        $fieldNode = $this->getFieldNode($type, $fieldName);

        return $fieldNode ? $fieldNode->type : null;
    }
@param ObjectType|InterfaceType $type
@param string                   $fieldName

@return TypeNode|null