{"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
            let end_inclusive = Size::from_bytes(end.bytes() - 1);
            let (start_block, start_bit) = InitMaskMaterialized::bit_index(start);
            let (end_block_inclusive, _) = InitMaskMaterialized::bit_index(end_inclusive);