manipulateMessageTime function
Implementation
String manipulateMessageTime(BuildContext context, DateTime messageDate) {
var format = MediaQuery.of(context).alwaysUse24HourFormat ? 24 : 12;
calendar = messageDate;
var hours = calendar.hour; //calendar[Calendar.HOUR]
var dateHourFormat = setDateHourFormat(format, hours);
return DateFormat(dateHourFormat).format(messageDate);
}