syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `ExpnId`s would end up with the same `Fingerprint`. Since `ExpnData` includes
context_before:     /// The `disambiguator` field is set by `update_disambiguator` when two distinct
context_after:     /// a `krate` field, this value only needs to be unique within a single crate.