public function reverse($preserveKeys = true)
    {
        $this->items = array_reverse($this->items, $this->getBoolable($preserveKeys));

        return $this;
    }
public function reverse($preserveKeys = true)
    {
        $this->items = array_reverse($this->items, $this->getBoolable($preserveKeys));

        return $this;
    }
public function reverse ( $ preserveKeys = true ) { $ this -> items = array_reverse ( $ this -> items , $ this -> getBoolable ( $ preserveKeys ) ) ; return $ this ; }
Reverse Container items.

@param bool|BooleanContract $preserveKeys
@return $this
Reverse Container items .