syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // All of these mean fat LTO
context_before:             config::LtoCli::Yes | config::LtoCli::Fat | config::LtoCli::NoParam => {
context_after:                 return config::Lto::Fat;