code: static List<String> integerWithEq(String name, @Nullable Integer value) {
      if (value != null) {
        return Collections.singletonList("--" + name + "=" + value.toString());
      }
      return Collections.emptyList();
    }
docs: Produces the flag form of an integer using {@link Integer#toString()}, separated by an equals
  character.
  
  @return {@code [--name=value]} or {@code []} if value is null.