/**
  *    Creates code within a class to generate replaced
  *    methods. All methods call the _invoke() handler
  *    with the method name and the arguments in an
  *    array.
  *    @param string $class     Class to clone.
  *    @param string $base      Base mock/stub class with methods that
  *                             cannot be cloned. Otherwise you
  *                             would be stubbing the accessors used
  *                             to set the stubs.
  *    @param array $methods    Additional methods.
  *    @static
  *    @access private
  */
 function _createHandlerCode($class, $base, $methods)
 {
     $code = "";
     $methods = array_merge($methods, get_class_methods($class));
     foreach ($methods as $method) {
         if (Stub::_isSpecialMethod($method)) {
             continue;
         }
         if (in_array($method, get_class_methods($base))) {
             continue;
         }
         $code .= "    function &{$method}() {\n";
         $code .= "        \$args = func_get_args();\n";
         $code .= "        return \$this->_invoke(\"{$method}\", \$args);\n";
         $code .= "    }\n";
     }
     return $code;
 }