syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// A hash of the filename & crate-id, used for uniquely identifying source
context_before:     pub normalized_pos: Vec<NormalizedPos>,
context_after:     /// files within the crate graph and for speeding up hashing in incremental