agent/api/container/transport.go
func (tp *TransportProtocol) MarshalJSON() ([]byte, error) {
	if tp == nil {
		return []byte("null"), nil
	}
	return []byte(`"` + tp.String() + `"`), nil
}
func (tp *TransportProtocol) MarshalJSON() ([]byte, error) {
	if tp == nil {
		return []byte("null"), nil
	}
	return []byte(`"` + tp.String() + `"`), nil
}
// MarshalJSON overrides the logic for JSON-encoding the TransportProtocol type