//                                                                           =========
    private static final PathMappingDbm _instance = new PathMappingDbm();

    private PathMappingDbm() {
    }

    public static PathMappingDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

    //                                                                           =========
    private static final ScheduledJobDbm _instance = new ScheduledJobDbm();

    private ScheduledJobDbm() {
    }

    public static ScheduledJobDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

    //                                                                           =========
    private static final SearchLogDbm _instance = new SearchLogDbm();

    private SearchLogDbm() {
    }

    public static SearchLogDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

    //                                                                           =========
    private static final FileAuthenticationDbm _instance = new FileAuthenticationDbm();

    private FileAuthenticationDbm() {
    }

    public static FileAuthenticationDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

	</component>

	<!-- Jobs -->
	<component name="crawlJob" class="org.codelibs.fess.job.CrawlJob" instance="prototype">
	</component>
	<component name="suggestJob" class="org.codelibs.fess.job.SuggestJob" instance="prototype">
	</component>
	<component name="aggregateLogJob" class="org.codelibs.fess.job.AggregateLogJob" instance="prototype">
	</component>

But we want to be able to parameterize that fixed content.

## A "callable" instance

In Python there's a way to make an instance of a class a "callable".

Not the class itself (which is already a callable), but an instance of that class.

To do that, we declare a method `__call__`:

//// tab | Python 3.9+

```Python hl_lines="12"

    + row.withPanels([
      panels.timeSeries.base('Ztunnel Versions', queries.istioBuild, 'Version number of each running instance'),
      panels.timeSeries.bytes('Memory Usage', queries.memUsage, 'Memory usage of each running instance'),
      panels.timeSeries.base('CPU Usage', queries.cpuUsage, 'CPU usage of each running instance'),
    ]),
    row.new('Network')
    + row.withPanels([

        "alertname": "MinIOClusterTolerance",
        "instance": "localhost:9000",
        "job": "minio-job-node",
        "pool": "0",
        "server": "127.0.0.1:9000",
        "set": "0",
        "severity": "critical"
      },
      "annotations": {
        "description": "MinIO instance 127.0.0.1:9000 of job minio-job has tolerance <=0 for more than 5 minutes.",
        "summary": "Instance 127.0.0.1:9000 unable to tolerate node failures"

    instance := grid.NewStream[*Payload, *Req, *Resp](h, newPayload, newReq, newResp)
	
    // Tweakable options
    instance.WithPayload = true // default true when newPayload != nil
    instance.OutCapacity = 1    // default
    instance.InCapacity = 1     // default true when newReq != nil
	
    // Register the handler on the manager
    instance.Register(manager, handler, "asubroute")
	

    //                                                                           =========
    private static final WebConfigDbm _instance = new WebConfigDbm();

    private WebConfigDbm() {
    }

    public static WebConfigDbm getInstance() {
        return _instance;
    }

    // ===================================================================================