which will fail with "Pod injection failed: template: inject:1: function "Istio_1_9_Required_Template_And_Version_Mismatched" not defined".
         This should make it obvious that their installation is broken.
     */}}
    template: {{ `{{ Template_Version_And_Istio_Version_Mismatched_Check_Installation }}` | quote }}
    templates:

         which will fail with "Pod injection failed: template: inject:1: function "Istio_1_9_Required_Template_And_Version_Mismatched" not defined".
         This should make it obvious that their installation is broken.
     */}}
    template: {{ `{{ Template_Version_And_Istio_Version_Mismatched_Check_Installation }}` | quote }}
    templates:

    Temporarily adopting this point of view (of the *external developer*) can help you feel like it's more obvious where to put the parameters, the Pydantic model for the body, for the response, etc. for that *external API*.

### Create a callback `APIRouter`

First create a new `APIRouter` that will contain one or more callbacks.

# Generate Clients

As **FastAPI** is based on the OpenAPI specification, you get automatic compatibility with many tools, including the automatic API docs (provided by Swagger UI).

One particular advantage that is not necessarily obvious is that you can **generate clients** (sometimes called <abbr title="Software Development Kits">**SDKs**</abbr> ) for your API, for many different **programming languages**.

## OpenAPI Client Generators

4. Validate your changes before committing.\
Run the `./gradlew sanityCheck` task again to make sure there are no more errors.

#### Filtering changes by severity

There is a somewhat non-obvious filter present on the page that allows you to control which type of messages are displayed.

However, one interesting aspect is how these policies associate with workloads.
Istio's AuthorizationPolicy has label selectors.
However, we intentionally do not send those as part of the Workload API, in order to keep the size low.

The obvious solution to this is to put the list of selected workloads into the policy itself.
However, this means anytime a workload changes (often), we need to update the policy.

            shouldDeduplicateBuiltInSymbols = false,

            // Because the file to compile may be contained in a "common" multiplatform module, an `expect` declaration doesn't necessarily
            // have an obvious associated `actual` symbol. `shouldStubOrphanedExpectSymbols` generates stubs for such `expect` declarations.
            shouldStubOrphanedExpectSymbols = true,

	legacyWebhook := getWebhooksFromYaml(t, legacyDefaultInjector)
	legacyRevWebhook := getWebhooksFromYaml(t, legacyRevisionInjector)

	// predicate is used to filter out "obvious" test cases, to avoid enumerating all cases
	// nolint: unparam
	predicate := func(ls LabelSet) (string, bool) {
		if ls.namespace.Get("istio-injection") == "disabled" {
			return "", true
		}

//	    (that are executed by other agents) or when customers pass requests through proxies, which may
//	    modify the user-agent.
//
//	Authorization:
//
//	    Is skipped for obvious reasons
var ignoredHeaders = map[string]bool{
	"Authorization": true,
	"User-Agent":    true,
}

// Headers to ignore in streaming v4
var ignoredStreamingHeaders = map[string]bool{
	"Authorization": true,

   *
   * But the methods in this class want to throw different exceptions, depending on the args, so it
   * appears that this pattern is not directly applicable. But we can use the ridiculous, devious
   * trick of throwing an exception in the middle of the construction of another exception. Hotspot
   * is fine with that.
   */

  /**