Issue with schema stitching

[dgcarneiro]

I working on stitching several schemas together and when passing the field to another call, I get the error
"The scalar path elements are only allowed at the end" which isnt clear for me, I attempted researching online but no luck. Can any clarify what i am doing wrong? A code example is below where the first snippet is from my graphql file and the second is the definition of product

extend type Query {
	product(id:String!)} : MyObject! @delegate(schema: "storage", path: "productById(name: $arguments:name)"
	availability: Boolean @delegate(schema:"warehouse", path: "exists(id: $fields.product).id")
	
)



//Definition of product in another class
Class product(){
string name {get;set;}
int id {get;set;}
}