syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:                     match tcx.as_lang_item(pred.def_id()) {
context_before:                     // `MetaSized`, and skip sizedness bounds to be added at the end.
context_after:                         Some(LangItem::Sized) => match pred.polarity {