nl_tokens: A extends B
pl_tokens: function extend ( a , b , noClone ) { // A extends B a = a || { } ; if ( typeof a !== 'object' || typeof a . length !== 'undefined' ) { return b ; } if ( typeof b !== 'object' ) { return b ; } if ( ! noClone ) { a = clone ( a ) ; } var bk = Object . keys ( b ) ; for ( var i = 0 , c = bk . length ; i < c ; i ++ ) { var key = bk [ i ] ; if ( ! a . hasOwnProperty ( key ) || ! ( typeof b [ key ] === 'object' && typeof b [ key ] . <mask> === 'undefined' ) && typeof b [ key ] !== 'function' ) { // Simple types a [ key ] = b [ key ] ; } else { // Complex types a [ key ] = extend ( a [ key ] , b [ key ] ) ; } } return a ; }