amTimeFormatHHMMSS method
Returns the DateTime in this format 05:30:56
;
Implementation
String amTimeFormatHHMMSS() {
final _hh = this.hour <= 9 ? '0${this.hour}' : '${this.hour}';
final _mm = this.minute <= 9 ? '0${this.minute}' : '${this.minute}';
final _ss = this.second <= 9 ? '0${this.second}' : '${this.second}';
return '$_hh:$_mm:$_ss';
}