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type Query {
i: I
u: U
f(x: ID, y: YInput): T
}
interface I {
id: ID!
f(x: ID, y: YInput): T
}
type A implements I {
id: ID!
f(x: ID, y: YInput): T
a: S
}
type B implements I {
id: ID!
f(x: ID, y: YInput): T
b: E
}
union U = A | B
scalar S
enum E {
A
B
}
type T {
x: ID
y: Y
}
type Y {
z: ID
}
input YInput {
z: ID
}
type Mutation {
m2(x: ID, y: YInput): M
}
type M {
n: String
}