public function index($index)
    {
        $this->params['index'] = array();
        $args                  = func_get_args();
        foreach ($args as $arg) {
            $this->params['index'][] = $arg;
        }

        return $this;
    }
public function index($index)
    {
        $this->params['index'] = array();
        $args                  = func_get_args();
        foreach ($args as $arg) {
            $this->params['index'][] = $arg;
        }

        return $this;
    }
public function index ( $ index ) { $ this -> params [ 'index' ] = array ( ) ; $ args = func_get_args ( ) ; foreach ( $ args as $ arg ) { $ this -> params [ 'index' ] [ ] = $ arg ; } return $ this ; }
Set the index to operate on

@param  string       $index     indices to operate on
@param  string       $index,... indices to operate on

@return IndexRequest
Set the index to operate on