{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
                let field_ptr = ptr.offset_value(fx, field_offset);
                let field_offset = fx.bcx.ins().imul_imm(lane_idx, lane_layout.size.bytes() as i64);
                CValue::by_ref(field_ptr, lane_layout)