validateAsSchema
Validate the given document as a schema:
Add the builtin definitions if they are not present already
Process any
@linkdirective and imports definition if anyensure uniqueness of schema/types/directives definitions
Merge type extensions
Although some validation is performed, this function does not pretend to implement the full GraphQL validation rules.
Receiver
the input document to validate and merge. It should not contain any builtin types The current validation is very simple and will only catch simple errors
Return
a GQLResult containing the schema and any potential issues