def protocol=(proto)
      err = GPGME::gpgme_set_protocol(self, proto)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      proto
    end
def protocol=(proto)
      err = GPGME::gpgme_set_protocol(self, proto)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      proto
    end
Getters and setters

 Set the +protocol+ used within this context. See {GPGME::Ctx.new} for
 possible values.