syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"time_llvm_passes:"}]}
source_snippet:     time_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
context_before:         "use a thread pool with N threads"),
context_after:         "measure time of each LLVM pass (default: no)"),