```\n   function testWithdrawETHfromRocketPool() public{\n    string memory MAINNET_RPC_URL = vm.envString("MAINNET_RPC_URL");\n    uint256 mainnetFork = vm.createFork(MAINNET_RPC_URL, 15361748);\n\n    RocketTokenRETHInterface rEth = RocketTokenRETHInterface(0xae78736Cd615f374D3085123A210448E74Fc6393);\n    vm.selectFork(mainnetFork);\n    uint totalCollateral = rEth.getTotalCollateral();\n    assertEq(totalCollateral, 0); // pools are empty\n\n    address owner = 0x50A78DFb9F5CC22ac8ffA90FA2B6C595881CCb97; // has rEth at block 15361748\n    uint rEthBalance = rEth.balanceOf(owner);\n    assertGt(rEthBalance, 0);\n    \n    vm.expectRevert("Insufficient ETH balance for exchange");\n    vm.prank(owner); \n    rEth.burn(rEthBalance);\n  }\n```\n