Method getOnMessageMethod

java/org/apache/tomcat/websocket/Util.java:551–557

(MessageHandler listener)

    }

    private static Method getOnMessageMethod(MessageHandler listener) {
        try {
            return listener.getClass().getMethod("onMessage", Object.class);
        } catch (NoSuchMethodException | SecurityException e) {
            throw new IllegalArgumentException(sm.getString("util.invalidMessageHandler"), e);
        }
    }

    private static Method getOnMessagePartialMethod(MessageHandler listener) {
        try {