syntax_data: {"ast_node_type":"import","tokens":[{"end":81,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// Used to enable cargo to use checksums to check if a crate is fresh rather
context_before:     pub src_hash: SourceFileHash,
context_after:     /// than mtimes. This might be the same as `src_hash`, and if the requested algorithm