syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"ar:"}]}
source_snippet:     ar: String = (String::new(), parse_string, [UNTRACKED],
context_before:     #[rustc_lint_opt_deny_field_access("documented to do nothing")]
context_after:         "this option is deprecated and does nothing",