In diesem Fall ist es der `str`:

```Python
"{$callback_url}/invoices/{$request.body.id}"
```

Wenn Ihr API-Benutzer (der externe Entwickler) also einen Request an *Ihre API* sendet, via:

```
https://yourapi.com/invoices/?callback_url=https://www.external.org/events
```

mit einem JSON-Körper:

```JSON
{
    "id": "2expen51ve",

/**
 * Handles injection of plugin executions induced by the lifecycle bindings for a packaging.
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface LifecycleBindingsInjector {

    /**
     * Injects plugin executions induced by lifecycle bindings into the specified model. The model has already undergone

)

var (
	// ErrMalformedBucketObjectConfig -indicates that the bucket object lock config is malformed
	ErrMalformedBucketObjectConfig = errors.New("invalid bucket object lock config")
	// ErrInvalidRetentionDate - indicates that retention date needs to be in ISO 8601 format
	ErrInvalidRetentionDate = errors.New("date must be provided in ISO 8601 format")
	// ErrPastObjectLockRetainDate - indicates that retention date must be in the future

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package crypto

import (
	xhttp "github.com/minio/minio/internal/http"
)

const (
	// MetaMultipart indicates that the object has been uploaded
	// in multiple parts - via the S3 multipart API.
	MetaMultipart = "X-Minio-Internal-Encrypted-Multipart"

	// MetaIV is the random initialization vector (IV) used for

    /**
     * Gets the relative path for a locally installed artifact.
     * Note that the artifact need not actually exist yet at
     * the returned location, the path merely indicates where
     * the artifact would eventually be stored.
     *
     * @param session The session to use, must not be {@code null}.
     * @param artifact The artifact for which to determine the path, must not be {@code null}.

// Kubelet uses this object to determine whether pod information needs to be passed on mount.
// CSIDriver objects are non-namespaced.
message CSIDriver {
  // Standard object metadata.
  // metadata.Name indicates the name of the CSI driver that this object
  // refers to; it MUST be the same name returned by the CSI GetPluginName()
  // call for that driver.
  // The driver name must be 63 characters or less, beginning and ending with

  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;

  // Spec holds information about the request being evaluated
  optional TokenRequestSpec spec = 2;

  // Status is filled in by the server and indicates whether the token can be authenticated.
  // +optional
  optional TokenRequestStatus status = 3;
}

// TokenRequestSpec contains client provided parameters of a token request.
message TokenRequestSpec {

  /**
   * Value for [B1_MASK_LENGTH] which indicates the next two bytes are the unsigned length.
   */
  internal const val PAYLOAD_SHORT = 126

  /** Maximum length of a frame payload to be denoted as [PAYLOAD_SHORT]. */
  internal const val PAYLOAD_SHORT_MAX = 0xffffL

  /**
   * Value for [B1_MASK_LENGTH] which indicates the next eight bytes are the unsigned
   * length.
   */

public interface ModelLocator {

    /**
     * Locates the POM file within the specified project directory. In case the given project directory does not exist
     * or does not contain a POM file, the return value indicates the expected path to the POM file. Subdirectories of
     * the project directory will not be considered when locating the POM file. The return value will be an absolute
     * path if the project directory is given as an absolute path.

  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;

  // Spec holds information about the pod being evaluated
  optional ImageReviewSpec spec = 2;

  // Status is filled in by the backend and indicates whether the pod should be allowed.
  // +optional
  optional ImageReviewStatus status = 3;
}

// ImageReviewContainerSpec is a description of a container within the pod creation request.