anchor.diff: -# https://gist.github.com/craigbeck/b90915d49fda19d5b2b17ead14dcd6da
  +# https://github.com/graphql/graphql-js/blob/master/src/utilities/introspectionQuery.js
   query IntrospectionQuery {
     __schema {
       queryType { name }
  
positive.code:       ofType {
          kind
          name
        }
      }
    }
  
negative.code:     ...TypeRef
    }
  }
  fragment InputValue on __InputValue {
    name
    description
    type { ...TypeRef }
    defaultValue
  }
  fragment TypeRef on __Type {
    kind
    name
  