[Lldb-commits] [lldb] update ManualDWARFIndex::Index to use std::once (PR #165896)

[Jonas Devlieghere via lldb-commits]

https://github.com/JDevlieghere commented:

To avoid the extra indentation, can you rename the current method to `IndexImpl`, make it private, and then call that from inside the call_once in `::Index`? 

https://github.com/llvm/llvm-project/pull/165896