@classmethod
def from_config(cls, xknx, name, config):
    """Initialize object from configuration structure."""
    group_address_speed = config.get('group_address_speed')
    group_address_speed_state = config.get('group_address_speed_state')
    return cls(xknx, name, group_address_speed=group_address_speed,
        group_address_speed_state=group_address_speed_state)
