Adding Error message to OpenAPI component schema

Is it possible to add a protobuff message to an OpenAPI schema component output?

I want to have a way to add a reference for an error case like 403.

Example:
```protobuf
service ExampleAPI {
rpc GetCurrentUser(google.protobuf.Empty) returns (UserResponse) {
option (google.api.http) = {
get: "/v1/current-user"
};
option (gnostic.openapi.v3.operation) = {
description: "";
responses: {
response_or_reference: {
name: "403"
value: {
response: {
description: "Forbidden"
content: {
additional_properties: [{
name: "*/*";
value: {
schema: {
reference: { _ref: "#/components/schemas/ErrorResponse"; }
}
}
}
}]
}
}
}
}
}
};
}
}

message UserResponse {
int id = 1;
string name = 2;
}

message ErrorResponse {
string message = 1;
}
```

Is this possible right now, or what would be the way to go for adding Error messages to OpenAPI Spec component?