def start_session(self, desired_capabilities, browser_profile=None):
if self.preserved_session_id:
self.command_executor._commands['getSession'] = ('GET', '/session/$sessionId')
self.session_id = self.preserved_session_id
response = self.execute('getSession', {'sessionId ': self.session_id})
self.session_id = response['sessionId']
self.capabilities = response['value']
else:
WebDriver.start_session(self, desired_capabilities, browser_profile)
