// minutesToDuration converts an integer number of minutes into duration string.
// Formats returned HH:MM, HHH:MM, HH, or HHH.
static function minutesToDuration($minutes, $abbreviate = false) {
// minutesToDuration converts an integer number of minutes into duration string.
// Formats returned HH:MM, HHH:MM, HH, or HHH.
static function minutesToDuration($minutes, $abbreviate = false) {