static WebSocketFrame ofContinuation(byte[] data, boolean finalFragment) {
        requireNonNull(data, "data");
        return new ByteArrayWebSocketFrame(data, WebSocketFrameType.CONTINUATION, finalFragment);
    }
Returns a new continuation {@link WebSocketFrame} with the data and {@code finalFragment}.
{@code isText} must be {@code true} if this continuation frame follows a text frame.
{@code false} if this follows a binary frame.

@see <a href="https://datatracker.ietf.org/doc/html/rfc6455#section-5.4">Fragmentation</a>
core/src/main/java/com/linecorp/armeria/common/websocket/WebSocketFrame.java