syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"threads:"}]}
source_snippet:     threads: usize = (1, parse_threads, [UNTRACKED],
context_before:     #[rustc_lint_opt_deny_field_access("use `Session::threads` instead of this field")]
context_after:         "use a thread pool with N threads"),