@classmethod
def execute(cls, inputs, files=None, **kwargs):
    """
        Function to be called from the outside to kick off the Service
        functionality.

        :param dictionary inputs: data parameters for Service, checked
            against the fields defined on the Service class.

        :param dictionary files: usually request's FILES dictionary or
            None.

        :param dictionary **kwargs: any additional parameters Service may
            need, can be an empty dictionary
        """
    instance = cls(inputs, files, **kwargs)
    instance.service_clean()
    with instance._process_context():
        return instance.process()
