syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"\"this"}]}
source_snippet:         "this option is deprecated and does nothing \
context_before:     inline_threshold: Option<u32> = (None, parse_opt_number, [UNTRACKED],
context_after:         (consider using `-Cllvm-args=--inline-threshold=...`)",