syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if witnesses.iter().all(|p| p.is_never_pattern()) && cx.tcx.features().never_patterns() {
context_before:             .join(" | ");
context_after:             // Arms with a never pattern don't take a body.