syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// (including hashing, equality, and ordering) operate on that index. The use
context_before: /// Internally, a `Symbol` is implemented as an index, and all operations
context_after: /// of `rustc_index::newtype_index!` means that `Option<Symbol>` only takes up 4 bytes,