syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"\"perform"}]}
source_snippet:         "perform LLVM link-time optimizations"),
context_before:     lto: LtoCli = (LtoCli::Unspecified, parse_lto, [TRACKED],
context_after:     metadata: Vec<String> = (Vec::new(), parse_list, [TRACKED],