syntax_data: {"ast_node_type":"import","tokens":[{"end":91,"kind":"keyword","start":0,"text":"#[rustc_lint_opt_deny_field_access(\"use"}]}
source_snippet:     #[rustc_lint_opt_deny_field_access("use `Session::fewer_names` instead of this field")]
context_before:         "turns on more checks to detect const UB, which can be slow (default: no)"),
context_after:     fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],