code: def compare_config(self):
          
          if self.ssh_connection is False:
              self._open_ssh()
  
          self.ssh_device.exit_config_mode()
          diff = self.ssh_device.send_command("show config diff")
          return diff.strip()
docs: Netmiko is being used to obtain config diffs because pan-python
          doesn't support the needed command.