nl_tokens: Transforms a range against an array of ops
pl_tokens: function transformRange ( range , ops ) { var rangeComps = range . split ( ':' ) , newRange var start = rangeComps [ 0 ] ops . forEach ( op => <mask> = transformRangeAnchor ( start , op , /*isStart:*/ true ) ) var end = rangeComps [ 1 ] ops . forEach ( op => end = transformRangeAnchor ( end , op , /*isStart:*/ false ) ) if ( start === end ) return start return start + ':' + end }