syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"degraded_spans:"}]}
source_snippet:     degraded_spans: Vec<MCDCBranchSpan>,
context_before: pub(crate) struct MCDCInfoBuilder {
context_after:     mcdc_spans: Vec<(MCDCDecisionSpan, Vec<MCDCBranchSpan>)>,