docs: @ForOverride
    protected SoyValue computeFunctionHelper(
        SoyJavaSourceFunction fn, List<SoyValue> args, final FunctionNode fnNode) {
      try {
        return new TofuValueFactory(fnNode, pluginInstances).computeForJava(fn, args, context);
      } catch (Exception e) {
        throw RenderException.create(
            "While computing function \"" + fnNode.toSourceString() + "\": " + e.getMessage(), e);
      }
    }