syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // loaded as a binary via `include_bytes!` and as proper `SourceFile`
context_before:         // in dep-info. There's also an edge case that file might be both
context_after:         // via `mod`, so we try to use real file contents and not just an