* to provide information to the user to track the problem back to its origin.
     *
     * @return The identifier of the model from which the problem originated or an empty string if unknown, never
     *         {@code null}.
     */
    @Nonnull
    String getModelId();

    /**
     * Gets the applicable maven version/validation level of this problem
     * @return The version, never {@code null}.
     */
    @Nonnull

package http

import (
	"context"
	"net"
	"time"
)

// LookupHost is a function to make custom lookupHost for optional cached DNS requests
type LookupHost func(ctx context.Context, host string) (addrs []string, err error)

// DialContextWithLookupHost is a helper function which returns `net.DialContext` function.
// It randomly fetches an IP via custom LookupHost function and dials it by the given dial

import org.apache.maven.project.CycleDetectedException;

/**
 */
public class ProjectCycleException extends BuildFailureException {
    public ProjectCycleException(String message) {
        super(message);
    }

    public ProjectCycleException(String message, CycleDetectedException cause) {
        super(message, cause);
    }

 */
public class InvalidPluginDescriptorException extends PlexusConfigurationException {

    public InvalidPluginDescriptorException(String message, Throwable cause) {
        super(message, cause);
    }

    public InvalidPluginDescriptorException(String message) {
        super(message);
    }

/**
 *
 */
@Deprecated(since = "4.0.0")
public class MisconfiguredToolchainException extends Exception {

    public MisconfiguredToolchainException(String message) {
        super(message);
    }

    public MisconfiguredToolchainException(String message, Throwable orig) {
        super(message, orig);
    }

/**
 */
@Deprecated
public class ArtifactDeploymentException extends Exception {
    public ArtifactDeploymentException(String message) {
        super(message);
    }

    public ArtifactDeploymentException(Throwable cause) {
        super(cause);
    }

    public ArtifactDeploymentException(String message, Throwable cause) {
        super(message, cause);
    }

/**
 */
@Deprecated
public class ArtifactInstallationException extends Exception {
    public ArtifactInstallationException(String message) {
        super(message);
    }

    public ArtifactInstallationException(Throwable cause) {
        super(cause);
    }

    public ArtifactInstallationException(String message, Throwable cause) {
        super(message, cause);
    }

 *
 */
@Deprecated
public class RepositoryMetadataInstallationException extends Throwable {
    public RepositoryMetadataInstallationException(String message) {
        super(message);
    }

    public RepositoryMetadataInstallationException(String message, Exception e) {
        super(message, e);
    }

```JSON
{"item_id":3}
```

/// check

Notice that the value your function received (and returned) is `3`, as a Python `int`, not a string `"3"`.

So, with that type declaration, **FastAPI** gives you automatic request <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>.

///

## Data validation { #data-validation }

```JSON
{"item_id":3}
```

/// check | Revisa

Nota que el valor que tu función recibió (y devolvió) es `3`, como un `int` de Python, no un string `"3"`.

Entonces, con esa declaración de tipo, **FastAPI** te ofrece <abbr title="convertir el string que viene de un request HTTP en datos de Python">"parsing"</abbr> automático de request.

///

## Validación de datos { #data-validation }