syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"\"optimization"}]}
source_snippet:         "optimization level (0-3, s, or z; default: 0)"),
context_before:     opt_level: String = ("0".to_string(), parse_string, [TRACKED],
context_after:     #[rustc_lint_opt_deny_field_access("use `Session::overflow_checks` instead of this field")]