scalar ThisIsAScalar @specifiedBy(url: "https://example.com")

type WithFieldA {
  a: String
}

type WithFieldB {
  b: String
}

union NonObjectType = WithFieldA | WithFieldB

extend union NonObjectType = ThisIsAScalar

union DuplicateMembers = WithFieldA

extend union DuplicateMembers = WithFieldA | WithFieldB

directive @nonRepeatable on UNION

union DuplicateDirective @nonRepeatable = WithFieldA

extend union DuplicateDirective @nonRepeatable = WithFieldB

type Query {
  x: Int
}