nl_tokens: Lazily construct the package hierarchy from class names .
pl_tokens: function ( classes ) { var map = { } ; function find ( name , data ) { var node = map [ name ] , i ; if ( ! node ) { node = map [ name ] = data || { name : name , children : [ ] } ; if ( name . length ) { node . <mask> = find ( "" ) ; node . parent . children . push ( node ) ; node . name = name ; node . key = escapeId ( name ) ; } } return node ; } classes . forEach ( function ( d ) { find ( d . name , d ) ; } ) ; return map [ "" ] ; }