docs: @Override
    protected void visitLetContentNode(LetContentNode node) {
      String generatedVarName = node.getUniqueVarName();
      visitLetParamContentNode(node, generatedVarName);
      templateTranslationContext
          .soyToJsVariableMappings()
          .put(node.getVarName(), id(generatedVarName));
    }