syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Replace the type of the self arg.
context_before:     fn visit_local_decl(&mut self, local: mir::Local, local_decl: &mut mir::LocalDecl<'tcx>) {
context_after:         if local == ty::CAPTURE_STRUCT_LOCAL {