def METHOD_NAME(elastic_san_name: Optional[pulumi.Input[str]] = None,
                            resource_group_name: Optional[pulumi.Input[str]] = None,
                            volume_group_name: Optional[pulumi.Input[str]] = None,
                            opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetVolumeGroupResult]:
    """
    Get an VolumeGroups.
    :param str elastic_san_name: The name of the ElasticSan.
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str volume_group_name: The name of the VolumeGroup.
    """
    ...