syntax_data: {"ast_node_type":"function","tokens":[{"end":81,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn initialize_start_block(&self, _: &mir::Body<'tcx>, _: &mut Self::Domain) {
context_after:         unimplemented!("This is never called since `MockAnalysis` is never iterated to fixpoint");