syntax_data: {"ast_node_type":"function","tokens":[{"end":33,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn new() -> Self {
context_before: impl MCDCInfoBuilder {
context_after:         Self { degraded_spans: vec![], mcdc_spans: vec![], state: MCDCState::new() }