def METHOD_NAME(resource_group_name: Optional[pulumi.Input[str]] = None,
                    step_name: Optional[pulumi.Input[str]] = None,
                    opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetStepResult]:
    """
    The resource representation of a rollout step.
    Azure REST API version: 2019-11-01-preview.
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str step_name: The name of the deployment step.
    """
    ...