nl_tokens: Finds the last index of the item outside of the given positions
pl_tokens: function lastIndexOfOutside ( data , item , index , exclude ) { var result , positionResult = { start : index ? index + 1 : <mask> . length + 1 , end : 0 } ; do { result = data . lastIndexOf ( item , positionResult . start - 1 ) ; } while ( result . index !== - 1 && ( positionResult = inPosition ( result . index , exclude ) ) ) ; return result ; }