code: def get_src_folder(self):
      
      with open('%s/settings.gradle' % self.path) as f:
        for line in f.readlines():
          if line.startswith('include'):
            matches = re.findall(r'\'\:?(.+?)\'', line)
          if len(matches) == 0:
            continue
          for folder in matches:
            if self.is_app_folder(folder):
              return folder
      return 'app'
docs: Gets the app source folder from settings.gradle file.
  
      Returns:
        A string containing the project source folder name (default is "app")