nl_tokens: Try to handle as a directory .
pl_tokens: function registerDir ( leaf , dir , name ) { var files ; try { files = fs . readdirSync ( dir ) ; } catch ( _error ) { } if ( files == null ) { return false ; } if ( name != null ) { leaf = subRegister ( leaf , name ) ; } for ( var i = 0 , len = files . length ; i < len ; i ++ ) { name = <mask> [ i ] ; leaf . register ( dir , name ) ; } return true ; }