def get_backend_instance(namespace, name, invoke_on_load=False):
    """
    Retrieve a class instance for the provided backend.

    :param name: Backend name.
    :type name: ``str``
    """
    cls = get_backend_driver(
        namespace=namespace, name=name, invoke_on_load=invoke_on_load
    )
    cls_instance = cls()

    return cls_instance

    Retrieve a class instance for the provided backend.

    :param name: Backend name.
    :type name: ``str``
    
st2common/st2common/util/driver_loader.py