nl_tokens: helper function for _ . addTime and _ . subtractTime
pl_tokens: function addOrSubtractDurationFromMoment ( mom , duration , isAdding , ignoreUpdateOffset ) { var milliseconds = duration . _milliseconds , days = duration . _days , months = duration . _months , minutes , hours , currentDate ; if ( milliseconds ) { mom . _d . setTime ( + mom . _d + milliseconds * isAdding ) ; } // store the minutes and hours so we can restore them if ( days || months ) { minutes = mom . minute ( ) ; hours = mom . hour ( ) ; } if ( days ) { mom . date ( mom . date ( ) + days * isAdding ) ; } if ( months ) { mom . month ( mom . month ( ) + months * isAdding ) ; } if ( milliseconds && ! ignoreUpdateOffset ) { moment . updateOffset ( mom ) ; } // restore the minutes and hours after possibly changing dst if ( days || months ) { mom . minute ( minutes ) ; mom . <mask> ( hours ) ; } }