{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"TyKind::ImplicitSelf"}]}
                    TyKind::ImplicitSelf => hir::ImplicitSelfKind::Imm,
                    TyKind::ImplicitSelf if is_mutable_pat => hir::ImplicitSelfKind::Mut,
                    // Given we are only considering `ImplicitSelf` types, we needn't consider