func (t Timestamp) String() string { // essentially RFC 3339
	if t.IsZero() {
		return "-"
	}
	return t.Format(time.RFC3339Nano)
}
// String returns the RFC 5424 representation of the timestamp. In
// particular, this is RFC 3339 with some restrictions and a special
// case of "-" for the zero value.
String returns the RFC 5424 representation of the timestamp. In
particular, this is RFC 3339 with some restrictions and a special
case of "-" for the zero value.
// String returns the RFC 5424 representation of the timestamp . In // particular this is RFC 3339 with some restrictions and a special // case of " - " for the zero value .
func (t Timestamp) String() string { 
	if t.IsZero() {
		return "-"
	}
	return t.Format(time.RFC3339Nano)
}
func ( t Timestamp ) String ( ) string { if t . IsZero ( ) { return " " } return t . Format ( time . RFC3339Nano ) }
String returns the RFC 5424 representation of the timestamp.
String returns the RFC 5424 representation of the timestamp .
// essentially RFC 3339