nl_tokens: Creates new range object instance
pl_tokens: function ( start , len ) { if ( _ . isUndefined ( start ) || <mask> === null ) return null ; if ( start instanceof Range ) return start ; if ( _ . isObject ( start ) && 'start' in start && 'end' in start ) { len = start . end - start . start ; start = start . start ; } return new Range ( start , len ) ; }