­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ nodeTypeResolver = $nodeTypeResolver; } public function isStringOrUnionStringOnlyType(Expr $expr) : bool { $nodeType = $this->nodeTypeResolver->getType($expr); return $nodeType->isString()->yes(); } }