Clang-format for C++ Brace initialization for complex Class

i have a class:

  class Bar {
   public:
    int left, right;
  };

  class Foo {
   public:
    Bar fake;
    Bar news;
  };

When I Init Foo with clang-format default config, i Got:

  const Foo a{
      .fake =
          {
              .left = 1,
              .right = 3,
          },
      .news =
          {
              .left = 233,
              .right = 2333,
          },
  };

But I want:

  const Foo a{
      .fake = {
        .left = 1,
        .right = 3,
      },
      .news = {
        .left = 233,
        .right = 2333,
      },
  };

I read this document, but there seems to be no corresponding content.

https://clang.llvm.org/docs/ClangFormatStyleOptions.html