syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:             {
context_before:                 && let Some(leaf_def_item) = leaf_def.item.def_id.as_local()
context_after:                 tcx.ensure_ok().compare_impl_item(leaf_def_item)?;