syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if n == self.opaques.len() {
context_before:             super::sig_types::walk_types(self.tcx, define, self);
context_after:                 self.tcx.dcx().span_err(span, "item does not contain any opaque types");