{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"infcx.tcx.erase_regions(opaque_type_key),"}]}
                    infcx.tcx.erase_regions(opaque_type_key),
                && let Some((prev_decl_key, prev_span)) = decls_modulo_regions.insert(
                    (opaque_type_key, concrete_type.span),