public function addMeta($meta, $data = [])
    {
        if (is_string($meta)) {
            $meta = [$meta => $data];
        }

        foreach ($meta as $key => $data) {
            self::$meta[$key] = $data;
        }
    }
public function addMeta($meta, $data = [])
    {
        if (is_string($meta)) {
            $meta = [$meta => $data];
        }

        foreach ($meta as $key => $data) {
            self::$meta[$key] = $data;
        }
    }
public function addMeta ( $ meta , $ data = [ ] ) { if ( is_string ( $ meta ) ) { $ meta = [ $ meta => $ data ] ; } foreach ( $ meta as $ key => $ data ) { self :: $ meta [ $ key ] = $ data ; } }
Add a meta attribute.

@return void
Add a meta attribute .