Set<String> exportedPackages = new HashSet<>(coreEntry.getExportedPackages());
        for (CoreExtensionEntry extension : extensions) {
            exportedArtifacts.addAll(extension.getExportedArtifacts());
            exportedPackages.addAll(extension.getExportedPackages());
        }

        final CoreExports exports = new CoreExports(containerRealm, exportedArtifacts, exportedPackages);

     *            {@code null}.
     * @return The record with the project realm and extension artifact filter, never {@code null}.
     * @throws PluginResolutionException If any build extension could not be resolved.
     */
    ProjectRealmCache.CacheRecord createProjectRealm(MavenProject project, Model model, ProjectBuildingRequest request)

    }

    private static String getKey(Plugin plugin, boolean extension) {
        String version = ArtifactUtils.toSnapshotVersion(plugin.getVersion());
        return (extension ? "extension>" : "plugin>") + plugin.getGroupId() + ":" + plugin.getArtifactId() + ":"
                + version;
    }

        }
    }

    private fun containsSrcFileWithString(
        srcRoot: File,
        content: String,
        exceptions: List<String>,
    ): Boolean {
        srcRoot.walkTopDown().forEach { file ->
            if (file.extension == "groovy" || file.extension == "java") {
                val originalText = file.readText()
                val text =
                    originalText

 * under the License.
 */
package org.apache.maven.execution;

import org.apache.maven.lifecycle.LifecycleExecutionException;

/**
 * <p>
 * Extension point that allows build extensions observe and possibly veto project build execution.
 * </p>
 * <strong>Note:</strong> This interface is part of work in progress and can be changed or removed without notice.
 *
 * @see ExecutionListener

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven;

import java.util.Set;

/**
 * @deprecated use {@code META-INF/maven/extension.xml} to define artifacts exported by Maven core extensions.
 */
@Deprecated
public interface ArtifactFilterManagerDelegate {

    void addExcludes(Set<String> excludes);

    void addCoreExcludes(Set<String> excludes);

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import gradlebuild.jvm.extension.StrictCompileExtension

extensions.create<StrictCompileExtension>("strictCompile")

val strictCompilerArgs = listOf("-Werror", "-Xlint:all", "-Xlint:-options", "-Xlint:-serial", "-Xlint:-classfile", "-Xlint:-try")

For example, let's add <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" class="external-link" target="_blank">ReDoc's OpenAPI extension to include a custom logo</a>.

### Normal **FastAPI** { #normal-fastapi }

First, write all your **FastAPI** application as normally:

import gradlebuild.integrationtests.createTestTask
import gradlebuild.integrationtests.extension.IntegrationTestExtension
import gradlebuild.integrationtests.setSystemPropertiesOfTestJVM

plugins {
    java
    id("gradlebuild.dependency-modules")
    id("gradlebuild.jvm-compile")
}

extensions.create<IntegrationTestExtension>("integTest").apply {
    generateDefaultAutoTestedSamplesTest.convention(true)

/**
 * Service provider interface for registering custom {@link Type} implementations.
 * <p>
 * This interface allows plugins and extensions to define and register additional artifact types
 * beyond the standard ones provided by Maven (like jar, war, pom, etc.). Types define how artifacts
 * are handled, including their default extension, classifier, and language.
 * <p>
 * Implementations of this interface will be discovered through the Java ServiceLoader mechanism