syntax_data: {"ast_node_type":"import","tokens":[{"end":92,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// because `rustc_index::newtype_index!` reserves the last 256 values for tagging purposes.
context_before: /// of `rustc_index::newtype_index!` means that `Option<Symbol>` only takes up 4 bytes,
context_after: ///