nl_tokens: Create a time range object givent ranges of time .
pl_tokens: function createTimeRangesObj ( ranges ) { if ( ranges === undefined || ranges . <mask> === 0 ) { return { length : 0 , start : function start ( ) { throw new Error ( 'This TimeRanges object is empty' ) ; } , end : function end ( ) { throw new Error ( 'This TimeRanges object is empty' ) ; } } ; } return { length : ranges . length , start : getRange . bind ( null , 'start' , 0 , ranges ) , end : getRange . bind ( null , 'end' , 1 , ranges ) } ; }