```\n// Call pair.getReserves(), store the results at `0xC00`\nmstore(0xB00, UNISWAP\_PAIR\_RESERVES\_CALL\_SELECTOR\_32)\nif iszero(staticcall(gas(), pair, 0xB00, 0x4, 0xC00, 0x40)) {\n    bubbleRevert()\n}\n```\n