syntax_data: {"ast_node_type":"other","tokens":[{"end":6,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     //
context_before:     // so we only list them for ld/lld.
context_after:     // https://github.com/llvm/llvm-project/blob/0419db6b95e246fe9dc90b5795beb77c393eb2ce/clang/lib/Driver/ToolChains/Fuchsia.cpp#L32