How to use gomodel directive for union types

[PhilipPeric]

Hello there 👋 Do someone have example of using gomodel directive for union types? I am getting "merging type systems failed: unable to bind to interface" error. Thanks in advance

type Calculation {
  condition: Condition
}

union Condition = ConditionA | ConditionB

type ConditionA @goModel(model: "url_to_proto_ConditionA") {
    minAmount: Int64
    maxAmount: Int64
}

type ConditionB @goModel(model: "url_to_proto_ConditionB") {
    amount: Int64!
}