## Die Instanz als Abhängigkeit verwenden

Dann könnten wir diesen `checker` in einem `Depends(checker)` anstelle von `Depends(FixedContentQueryChecker)` verwenden, da die Abhängigkeit die Instanz `checker` und nicht die Klasse selbst ist.

Und beim Auflösen der Abhängigkeit ruft **FastAPI** diesen `checker` wie folgt auf:

```Python
checker(q="somequery")

		check.errorf(e, NotAType, "%s is not a type", obj.Name())
		// avoid "declared but not used" errors
		// (don't use Checker.use - we don't want to evaluate too much)
		if v, _ := obj.(*Var); v != nil && v.pkg == check.pkg /* see Checker.use1 */ {
			v.used = true
		}
		return
	}

	// Type-check the object.
	// Only call Checker.objDecl if the object doesn't have a type yet
	// (in which case we must actually determine it) or the object is a

        repo.expectCloneSomething()
        run('checkDeps')

        then:
        fixture.expectGraph {
            root(":", "test:consumer:1.2") {
                edge("test:test:latest.integration", ":dep", "test:test:2.0") {
                }
            }
        }
        result.assertTasksExecuted(":dep:jar_2.0", ":checkDeps")

        when:

// An error_ represents a type-checking error.
// A new error_ is created with Checker.newError.
// To report an error_, call error_.report.
type error_ struct {
	check *Checker
	desc  []errorDesc
	code  Code
	soft  bool // TODO(gri) eventually determine this from an error code
}

// newError returns a new error_ with the given error code.
func (check *Checker) newError(code Code) *error_ {
	if code == 0 {

	)
}

// dump is only needed for debugging
func (check *Checker) dump(format string, args ...any) {
	fmt.Println(sprintf(check.fset, check.qualifier, true, format, args...))
}

func (check *Checker) qualifier(pkg *Package) string {
	// Qualify the package unless it's the package being type-checked.
	if pkg != check.pkg {
		if check.pkgPathMap == nil {

        "com.gradle" | "api" | false
    }

    def "mutation is checked for public API"() {
        def checker = Mock(MutationValidator)
        rules.setMutationValidator(checker)

        when: rules.all(Actions.doNothing())
        then: 1 * checker.validateMutation(STRATEGY)

        when: rules.all(Closure.IDENTITY)
        then: 1 * checker.validateMutation(STRATEGY)

        when: rules.all(ruleSource)

			Method: "GET",
		},
		Count: 1,
		Retry: echo.Retry{
			Options: append(defaultOptions, options...),
		},
		Check: checker,
	}

	_ = cltInstance.CallOrFail(ctx, httpOpts)
}

func sendTrafficToHostname(ctx framework.TestContext, checker echo.Checker, hostname string, options ...retry.Option) {
	ctx.Helper()
	if len(GetClientInstances()) == 0 {
		ctx.Fatal("there is no client")
	}

func (v Visitor) Or(o Visitor) Visitor {
	return func(r echoClient.Response) error {
		if err := v(r); err != nil {
			return err
		}
		return o(r)
	}
}

// Checker returns an echo.Checker based on this Visitor.
func (v Visitor) Checker() echo.Checker {
	return func(result echo.CallResult, _ error) error {
		rs := result.Responses
		if rs.IsEmpty() {
			return fmt.Errorf("no responses received")
		}

	)
}

// dump is only needed for debugging
func (check *Checker) dump(format string, args ...any) {
	fmt.Println(sprintf(check.qualifier, true, format, args...))
}

func (check *Checker) qualifier(pkg *Package) string {
	// Qualify the package unless it's the package being type-checked.
	if pkg != check.pkg {
		if check.pkgPathMap == nil {

//     as a type constraint in Go code
//   - if T is an uninstantiated generic type
func AssertableTo(V *Interface, T Type) bool {
	// Checker.newAssertableTo suppresses errors for invalid types, so we need special
	// handling here.
	if !isValid(T.Underlying()) {
		return false
	}
	return (*Checker)(nil).newAssertableTo(nopos, V, T, nil)
}

// AssignableTo reports whether a value of type V is assignable to a variable
// of type T.