{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
                let vtable_byte_offset = u64::try_from(entry_idx).unwrap() * ptr_size.bytes();
                let ptr_size = bx.data_layout().pointer_size();
                load_vtable(bx, old_info, bx.type_ptr(), vtable_byte_offset, source, true)