SimpleMessage(ValidationMessageChecker checker) {
            super(checker)
        }

    }

    static class MutableTypeWithSetter extends ValidationMessageDisplayConfiguration<MutableTypeWithSetter> {
        String propertyType

        MutableTypeWithSetter(ValidationMessageChecker checker) {
            super(checker)
        }

	return validators
}

// addIPv6Checks adds IPv6 related checks
func addIPv6Checks(checks []Checker) []Checker {
	checks = append(checks,
		FileContentCheck{Path: ipv6DefaultForwarding, Content: []byte{'1'}},
	)
	return checks
}

// addIPv4Checks adds IPv4 related checks
func addIPv4Checks(checks []Checker) []Checker {
	checks = append(checks,
		FileContentCheck{Path: ipv4Forward, Content: []byte{'1'}})
	return checks

```Python hl_lines="16"
{!../../../docs_src/dependencies/tutorial011.py!}
```

这样就可以**参数化**依赖项，它包含 `checker.fixed_content` 的属性 - `"bar"`。

## 把实例作为依赖项

然后，不要再在 `Depends(checker)` 中使用 `Depends(FixedContentQueryChecker)`， 而是要使用 `checker`，因为依赖项是类实例 - `checker`，不是类。

处理依赖项时，**FastAPI** 以如下方式调用 `checker`：

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

……并用*路径操作函数*的参数 `fixed_content_included` 返回依赖项的值：

```Python hl_lines="20"

          <item index="10" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
          <item index="11" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
          <item index="12" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />

// 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 {

## 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")

// For more about specifying packages, see 'go help packages'.
// For a list of checkers and their flags, see 'go tool vet help'.
// For details of a specific checker such as 'printf', see 'go tool vet help printf'.
//
// The -vettool=prog flag selects a different analysis tool with alternative
// or additional checks.
// For example, the 'shadow' analyzer can be built and run using these commands:
//

		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:

	)
}

// 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 {