Variable editor is broken

[schickling]

Seems like the variable editor is broken in one of the recent releases.

Error message:

Example:

input UserCreateInput {
  role: Role!
  email: String
  password: String
  posts: PostCreateManyWithoutAuthorInput
}

mutation ($_data: UserCreateInput!) {
  createUser(data: $_data) {
    id
  }
}

{
  "_data": {
    "role": "CUSTOMER",
    "email": "testa10",
    "password": "testest"
  }
}

[sorenbs]

It seems that Playground always treats variables as optional even when they are used for a variable that is required.

Here's the error message so others can find this issue by searching:

Uncaught Error: Can only create NonNull of a Nullable GraphQLType but got