syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"debug!(\"visit_primary_bindings:"}]}
source_snippet:                     debug!("visit_primary_bindings: subpattern_user_tys={subpattern_user_tys:?}");
context_before:                     let subpattern_user_tys = user_tys.leaf(subpattern.field);
context_after:                     visit_subpat(self, &subpattern.pattern, &subpattern_user_tys, f);