syntax_data: {"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut ret = self.bottom_value(self.body);
context_before:     fn mock_entry_set(&self, bb: BasicBlock) -> DenseBitSet<usize> {
context_after:         ret.insert(Self::BASIC_BLOCK_OFFSET + bb.index());