* The same with `app/routers/users.py`, it's another submodule: `app.routers.users`.
* There's also a subdirectory `app/internal/` with another file `__init__.py`, so it's another "Python subpackage": `app.internal`.
* And the file `app/internal/admin.py` is another submodule: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.drawio.svg">

The same file structure with comments:

```bash
.

 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.gradle.internal.precommit;

import org.elasticsearch.gradle.internal.InternalPlugin;
import org.elasticsearch.gradle.internal.conventions.util.Util;
import org.gradle.api.Project;
import org.gradle.api.provider.Provider;

import java.io.File;

import (
	"bytes"
	"context"
	"maps"
	"sync"

	"github.com/minio/minio-go/v7"
	"github.com/minio/minio-go/v7/pkg/tags"
	"github.com/minio/minio/internal/crypto"
	"github.com/minio/minio/internal/hash"
	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/kms"
)

type fanOutOptions struct {
	Kind     crypto.Type
	KeyID    string
	Key      []byte
	KmsCtx   kms.Context
	Checksum *hash.Checksum

 */
package jcifs.internal.smb2.nego;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.DialectVersion;
import jcifs.internal.SmbNegotiationRequest;
import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

import org.elasticsearch.gradle.internal.test.rest.transform.RestTestTransformGlobalSetup;
import org.elasticsearch.gradle.internal.test.rest.transform.feature.FeatureInjector;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.Internal;
import org.jetbrains.annotations.Nullable;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2;

import jcifs.Configuration;
import jcifs.internal.CommonServerMessageBlock;
import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.SMBSigningDigest;
import jcifs.internal.util.SMBUtil;
import jcifs.smb.SmbException;
import jcifs.util.Hexdump;

/**

import org.apache.maven.artifact.DefaultArtifact;
import org.apache.maven.internal.transformation.PomArtifactTransformer;
import org.apache.maven.internal.transformation.TransformationFailedException;
import org.apache.maven.project.MavenProject;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.internal.impl.checksum.Sha1ChecksumAlgorithmFactory;

	"github.com/minio/mux"
	"github.com/minio/pkg/v3/policy"

	"github.com/minio/minio/internal/auth"
	levent "github.com/minio/minio/internal/config/lambda/event"
	"github.com/minio/minio/internal/hash/sha256"
	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/logger"
)

var getLambdaEventData = func(bucket, object string, cred auth.Credentials, r *http.Request) (levent.Event, error) {

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.internal.smb2;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Echo request message.
 *
 * This command is used to test connectivity and ensure the
 * SMB2 connection is still active.
 *

 */
package org.apache.maven.lifecycle.internal.builder;

import java.util.List;
import java.util.concurrent.ExecutionException;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.ProjectBuildList;
import org.apache.maven.lifecycle.internal.ReactorBuildStatus;
import org.apache.maven.lifecycle.internal.ReactorContext;
import org.apache.maven.lifecycle.internal.TaskSegment;

/**
 * <p>