@Nullable
    @Override
    public String generate(@NotNull ChainVariable inVar,
                           @NotNull ChainVariable outVar,
                           @NotNull String code,
                           @NotNull OptionalToIfContext context) {
      context.setInitializer("java.util.stream.Stream.empty()");
      return context.createResult("java.util.stream.Stream.of(" + outVar.getName() + ")");
    }
@Nullable
    @Override
    public String generate(@NotNull ChainVariable inVar,
                           @NotNull ChainVariable outVar,
                           @NotNull String code,
                           @NotNull OptionalToIfContext context)