nl_tokens: Creates a shallow copy of an object an array or a primitive
pl_tokens: function shallowCopy ( src , dst ) { var i = 0 ; if ( isArray ( src ) ) { dst = dst || [ ] ; for ( ; i < src . length ; i ++ ) { dst [ i ] = src [ i ] ; } } else if ( isObject ( src ) ) { dst = dst || { } ; var keys = Object . keys ( src ) ; for ( var l = keys . length ; i < l ; i ++ ) { var key = keys [ i ] ; if ( ! ( <mask> . charAt ( 0 ) === '$' && key . charAt ( 1 ) === '$' ) ) { dst [ key ] = src [ key ] ; } } } return dst || src ; }