syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // to v4, so we do the same.
context_before:         // LLVM notes that macOS 10.11+ and iOS 9+ default
context_after:         // https://github.com/llvm/llvm-project/blob/378778a0d10c2f8d5df8ceff81f95b6002984a4b/clang/lib/Driver/ToolChains/Darwin.cpp#L1203