old_contents: let restartButton = document.createElement('div');
  restartButton.className = 'extension-fab';
  restartButton.id = 'extension-fab';
  document.body.appendChild(restartButton);
  
  let buttonText = document.createElement('p');
  buttonText.className = 'button-text';
  buttonText.innerText = 'click me ' + version;
  restartButton.appendChild(buttonText);
  
  const STATIC_EXTENSION_ID = 'mygeneratedid';
  restartButton.addEventListener('click', () => {
      chrome.runtime.sendMessage(
          STATIC_EXTENSION_ID,
          {
           methodName: 'callRestart',
          });
  });
new_contents: let restartButton = document.createElement('div');
  restartButton.className = 'extension-button';
  restartButton.id = 'extension-button';
  document.body.appendChild(restartButton);
  
  let buttonText = document.createElement('p');
  buttonText.className = 'button-text';
  buttonText.innerText = 'Restart App';
  restartButton.appendChild(buttonText);
  
  const STATIC_EXTENSION_ID = 'mygeneratedid';
  restartButton.addEventListener('click', () => {
      chrome.runtime.sendMessage(
          STATIC_EXTENSION_ID,
          {
           methodName: 'callRestart',
          });
  });
subject: Fix my class name