src/main/java/org/java_websocket/server/WebSocketServer.java
public void broadcast(byte[] data, Collection<WebSocket> clients) {
		if (data == null || clients == null) {
			throw new IllegalArgumentException();
		}
		broadcast(ByteBuffer.wrap(data), clients);
	}
public void broadcast(byte[] data, Collection<WebSocket> clients) {
		if (data == null || clients == null) {
			throw new IllegalArgumentException();
		}
		broadcast(ByteBuffer.wrap(data), clients);
	}
Send a byte array to a specific collection of websocket connections
@param data the data to send to the endpoints
@param clients a collection of endpoints to whom the text has to be send