@property
    def client(self):
        return self.api
check if the object exists in current window.
dataset/ETHPy150Open openstack/python-cloudkittyclient/cloudkittyclient/common/base.py/Manager.client--crossover with--dataset/ETHPy150Open xiaocong/uiautomator/uiautomator/__init__.py/AutomatorDeviceUiObject.exists