syntax_data: {"ast_node_type":"other","tokens":[{"end":14,"kind":"keyword","start":0,"text":"|ty|"}]}
source_snippet:         |ty| {
context_before:         tcx.type_of(impl_def_id).instantiate_identity(),
context_after:             ocx.structurally_normalize_ty(&cause, param_env, ty).unwrap_or_else(|_| {