syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"fewer_names:"}]}
source_snippet:     fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],
context_before:     #[rustc_lint_opt_deny_field_access("use `Session::fewer_names` instead of this field")]
context_after:         "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \