nl_tokens: Returns the key of the item with the highest value in the object .
pl_tokens: function keyOfMax ( o , func ) { if ( ! o || typeof o !== 'object' ) return o ; if ( libs . object . size ( o ) === 0 ) return ; if ( ! ( func instanceof Function ) ) func = undefined ; var max , maxValue , maxKey ; if ( ! func ) { max = libs . object . first ( o ) ; maxKey = libs . object . keys ( o ) [ 0 ] ; libs . object . each ( o , 1 , function ( item , key ) { if ( item >= max ) { max = item ; maxKey = key ; } } ) ; } else { <mask> = libs . object . first ( o ) ; maxKey = libs . object . keys ( o ) [ 0 ] ; maxValue = func . call ( max , max ) ; libs . object . each ( o , 1 , function ( item , key ) { var value = func . call ( item , item ) ; if ( value >= maxValue ) { if ( value >= maxValue ) { max = item ; maxValue = value ; maxKey = key ; } } } ) ; } return maxKey ; }