`APIRouter` class, used to group *path operations*, for example to structure
    an app in multiple files. It would then be included in the `FastAPI` app, or
    in another `APIRouter` (ultimately included in the app).

    Read more about it in the
    [FastAPI docs for Bigger Applications - Multiple Files](https://fastapi.tiangolo.com/tutorial/bigger-applications/).

    ## Example

    ```python

	mux := NewServeMux()
	mux.Handle("example.com/pkg/foo/", stringHandler("example.com/pkg/foo/"))
	mux.Handle("example.com/pkg/bar", stringHandler("example.com/pkg/bar"))
	mux.Handle("example.com/pkg/bar/", stringHandler("example.com/pkg/bar/"))
	mux.Handle("example.com:3000/pkg/connect/", stringHandler("example.com:3000/pkg/connect/"))
	mux.Handle("example.com:9000/", stringHandler("example.com:9000/"))

	{want: "<nil>"},

	{noenv: "example.com", req: "http://example.com/", env: "proxy", want: "<nil>"},
	{noenv: ".example.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},
	{noenv: "ample.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},
	{noenv: "example.com", req: "http://foo.example.com/", env: "proxy", want: "<nil>"},
	{noenv: ".foo.com", req: "http://example.com/", env: "proxy", want: "http://proxy"},

				"url('/path').getScheme() == ''",
				"url('https://example.com/').getScheme() == 'https'",
				"url('https://example.com:80/').getHost() == 'example.com:80'",
				"url('https://example.com/').getHost() == 'example.com'",
				"url('https://[::1]:80/').getHost() == '[::1]:80'",
				"url('https://[::1]/').getHost() == '[::1]'",
				"url('/path').getHost() == ''",
				"url('https://example.com:80/').getHostname() == 'example.com'",

				Controller: "example.com/controller",
				Parameters: &networking.IngressClassParametersReference{
					APIGroup: utilpointer.StringPtr("example.com"),
					Kind:     "customgroup",
					Name:     "example",
				},
			},
		},
		expected: []metav1.TableRow{{Cells: []interface{}{"test1", "example.com/controller", "customgroup.example.com/example", "10y"}}},
	}, {
		name: "example without params",

//
//   - "/index.html" matches the path "/index.html" for any host and method.
//   - "GET /static/" matches a GET request whose path begins with "/static/".
//   - "example.com/" matches any request to the host "example.com".
//   - "example.com/{$}" matches requests with host "example.com" and path "/".
//   - "/b/{bucket}/o/{objectname...}" matches paths whose first segment is "b"

    is a boolean value. For example:

    ```mlir
    tfl.if %b  {
      ...
    } else {
      ...
    }
    ```

    `tfl.if` may also return results that are defined in its regions. The
    values defined are determined by which execution path is taken.

    Example:

    ```mlir
    %x, %y = tfl.if %b -> (tensor<f32>, tensor<f32>) {

          },
          "pods": {
            "allOf": [
              {
                "$ref": "#/components/schemas/io.k8s.api.autoscaling.v2.PodsMetricSource"
              }
            ],

 * <code>smb1://domain;username:password@server/share/path/to/file.txt</code></td><td>
 * A prototypical example that uses all the fields.
 * </td></tr>
 * 
 * <tr><td width="20%"><code>smb1://myworkgroup/angus/ &lt;-- ILLEGAL </code></td><td>
 * Despite the hierarchial relationship between workgroups, servers, and
 * filesystems this example is not valid.
 * </td></tr>
 *
 * <tr><td width="20%">

 *         .transform((closer, result) -> result.get("userName"), directExecutor())
 *         .catching(DBException.class, e -> "no user", directExecutor())
 *         .finishToFuture();
 * }</pre>
 *
 * In this example, when the {@code userName} {@link Future} is done, the transaction and the query
 * result cursor will both be closed, even if the operation is cancelled or fails.
 *
 * <h4>Manually closing</h4>
 *