syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // incr. comp. uses to identify a CrateNum.
context_before:     // This information is safe to access, since it's hashed as part of the StableCrateId, which
context_after:     fn crate_name(&self, cnum: CrateNum) -> Symbol;