I have a field named ‘source’, i need make it required if another field ‘type’ = 2 or ‘type’ = 3
how should i write it ?

// @gotags: json:"source" validate:"required_if=Type 2 | required_if=Type 3"
  string Source = 4;

This returns error on validation.
I try even "required_if=Type 2|required_if=Type 3"

and "required_if=Type 2| required_if=Type 3"
and "required_if=Type 2|required_if=Type 3"
and "required_if=Type 2 |required_if=Type 3"
and "required_if=Type 2|3"

none of them works.