WP_Site::__isset( string $key ): bool

258	public function __isset( $key ) {259		switch ( $key ) {260			case 'id':261			case 'network_id':262				return true;263			case 'blogname':264			case 'siteurl':265			case 'post_count':266			case 'home':267				if ( ! did_action( 'ms_loaded' ) ) {268					return false;269				}270				return true;271			default: // Custom properties added by 'site_details' filter.272				if ( ! did_action( 'ms_loaded' ) ) {273					return false;274				}275 276				$details = $this->get_details();277				if ( isset( $details->$key ) ) {278					return true;279				}280		}281 282		return false;283	}