### Question:
WebsocketProtocolClientFactory implements ProtocolClientFactory { @Override public String getScheme() { return "ws"; }  @Override String getScheme(); @Override WebsocketProtocolClient getClient(); @Override CompletableFuture<Void> destroy();  }### Answer:
@Test public void getScheme() { assertEquals("ws", new WebsocketProtocolClientFactory().getScheme()); }