syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // 2. we favor `instantiating_crate` where possible (i.e. when `Some`)
context_before:     // either and have a stable choice of symbol mangling version
context_after:     let mangling_version_crate = instantiating_crate.unwrap_or(def_id.krate);