{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "SetIamPolicyRequest",
  "type": "object",
  "description": "Request message for SetIamPolicy method.",
  "properties": {
    "updateMask": {
      "type": "string",
      "description": "A FieldMask specifying which fields of the policy to modify. Only the fields in the mask will be modified."
    }
  }
}