contract Accessibility {
  address private owner;
  modifier onlyOwner() {
    require(msg.sender == owner, "access denied");
    _;
  }

  constructor() public {
    owner = msg.sender;
  }

  // Deletion of contract holder and waiver of ownership
  
  function disown() internal {
    delete owner;
  }
}
function disown() internal {
  delete owner;
}

// Deletion of contract holder and waiver of ownership