def METHOD_NAME(group_id: Optional[pulumi.Input[str]] = None,
                     resource_group_name: Optional[pulumi.Input[str]] = None,
                     service_name: Optional[pulumi.Input[str]] = None,
                     opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetGroupResult]:
    """
    Gets the details of the group specified by its identifier.
    :param str group_id: Group identifier. Must be unique in the current API Management service instance.
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str service_name: The name of the API Management service.
    """
    ...