syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"visit::walk_pat(self,"}]}
source_snippet:                 visit::walk_pat(self, pat);
context_before:                 let old_inside_adt = std::mem::replace(&mut self.inside_adt, false);
context_after:                 self.inside_adt = old_inside_adt;