syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":".map(|ctxt|"}]}
source_snippet:                     .map(|ctxt| (ctxt, data.syntax_context_data[ctxt.0 as usize].key()))
context_before:                 latest_ctxts
context_after:                     .collect()