static WebSocketClientBuilder builder(String scheme, EndpointGroup endpointGroup, String path) {
        requireNonNull(scheme, "scheme");
        return builder(Scheme.parse(scheme), endpointGroup, path);
    }
Returns a new {@link WebSocketClientBuilder} created with the specified {@code scheme},
the {@link EndpointGroup}, and the {@code path}.
core/src/main/java/com/linecorp/armeria/client/websocket/WebSocketClient.java