syntax_data: {"ast_node_type":"import","tokens":[{"end":80,"kind":"keyword","start":0,"text":"\"choose"}]}
source_snippet:         "choose the TLS model to use (`rustc --print tls-models` for details)"),
context_before:     tls_model: Option<TlsModel> = (None, parse_tls_model, [TRACKED],
context_after:     trace_macros: bool = (false, parse_bool, [UNTRACKED],