syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"err.span_label("}]}
source_snippet:                 err.span_label(
context_before:             if let hir::def::DefKind::Const | hir::def::DefKind::AssocConst = def_kind {
context_after:                     self.tcx.def_span(uv.def),