syntax_data: {"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"latest_ctxts"}]}
source_snippet:                 latest_ctxts
context_before:             let all_ctxt_data: Vec<_> = HygieneData::with(|data| {
context_after:                     .map(|ctxt| (ctxt, data.syntax_context_data[ctxt.0 as usize].key()))