toHoursMinutesFormatString function
Converts a string representation of a duration in the format "HH:mm" to a formatted string.
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Parameters:
- duration: A string representing the duration in "HH:mm" format.
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Returns: A formatted string in "HH:mm" format, or "00:00" if the input is invalid.
Implementation
String toHoursMinutesFormatString(String? duration) {
return toHoursMinutesFormat(parseDuration(duration));
}