modifier onlyOwner() {
  require(msg.sender == owner, "Caller is not the owner");
  _;
}
8:     modifier onlyOwner() { // <= FOUND
9:         msg.sender == owner; // <= FOUND
10:         _;
11:     }
13:     modifier onlyManager() { // <= FOUND
14:         managers[msg.sender] == true; // <= FOUND
15:         _;
16:     }
