syntax_data: {"ast_node_type":"other","tokens":[{"end":105,"kind":"keyword","start":0,"text":"\"{kind:?}"}]}
source_snippet:                 "{kind:?} has not seen any uses of `walk_types` yet, ping oli-obk if you'd like any help"
context_before:                 tcx.def_span(item),
context_after:             )