syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"mcdc_spans:"}]}
source_snippet:     mcdc_spans: Vec<(MCDCDecisionSpan, Vec<MCDCBranchSpan>)>,
context_before:     degraded_spans: Vec<MCDCBranchSpan>,
context_after:     state: MCDCState,