Load application bundled services.

        :return: <void>

def _loadViperServices(self):
        """
        Load application bundled services.

        :return: <void>
        """
        servicesPath = os.path.join(
            os.path.dirname(os.path.realpath(__file__)),
            "service"
        )
        for serviceFile in os.listdir(servicesPath):
            if serviceFile.startswith("__") or serviceFile.startswith("."):
                continue

            serviceName = serviceFile.replace(".py", "")
            servicePath = os.path.join(
                servicesPath, serviceFile
            )

            if not os.path.isfile(servicePath):
                continue

            # importing service
            serviceSpec = importlib.util.spec_from_file_location(
                serviceName,
                servicePath
            )
            service = importlib.util.module_from_spec(serviceSpec)
            serviceSpec.loader.exec_module(service)

            # initializing service
            serviceInstance = service.Service(self)
            self.addService("viper", serviceName, serviceInstance)