query parameters as string interpolation?

https://github.com/LiUGraphQL/LinGBM/blob/master/artifacts/queryTemplates/main/QT10.txt#L3 shows
```graphql
query stringMatching($keyword:String) {
 	publicationSearch(field:title, criterion:CONTAINS, pattern:"$keyword") { 
```

However, afaik GraphQL params are passed as variables and there's no "string interpolation" So I think it should be without the quotes?
```
 	pattern:$keyword
```