syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"\"explicitly"}]}
source_snippet:         "explicitly enable the `cfg(debug_assertions)` directive"),
context_before:     debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
context_after:     debuginfo: DebugInfo = (DebugInfo::None, parse_debuginfo, [TRACKED],