llvm-project

b6d940d9 - [libc++][multimap] Applied `[[nodiscard]]` (#171644)

[libc++][multimap] Applied `[[nodiscard]]` (#171644) `[[nodiscard]]` should be applied to functions where discarding the return value is most likely a correctness issue. - https://libcxx.llvm.org/CodingGuidelines.html - https://wg21.link/multimap