checkNotNull(timeoutUnit);
    checkPositiveTimeout(timeoutDuration);
    checkArgument(interfaceType.isInterface(), "interfaceType must be an interface type");

    Set<Method> interruptibleMethods = findInterruptibleMethods(interfaceType);

    InvocationHandler handler =
        (obj, method, args) -> {
          Callable<@Nullable Object> callable =
              () -> {
                try {