throw new RuntimeException("No targetClass specified for extension provided by plugin '$pluginId'.")
                }
                def extension = extensions[targetClass]
                if (!extension) {
                    extension = new gradlebuild.docs.dsl.docbook.model.ClassExtensionMetaData(targetClass)
                    extensions[targetClass] = extension
                }
                def mixinClass = e.'@mixinClass'

     * Gets the extractor for the specified file extension.
     *
     * @param ext the file extension
     * @return the extractor for the extension, or null if not found
     */
    private Extractor getExtractor(final String ext) {
        return extractorMap.get(ext);
    }

    /**
     * Gets the output extension for the specified input extension.
     *
     * @param extension the input file extension

  <groupId>org.apache.maven.test</groupId>
  <artifactId>project-with-build-extensions-plugin</artifactId>
  <version>1.0</version>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin</artifactId>
        <version>0.1</version>
        <extensions>true</extensions>
        <executions>
          <execution>
            <id>load</id>

            gradleRootProject.extensions.extraProperties.set("collectedInfo-${klass.simpleName}-${rootProjectName}", buildService.get().collectedInformation)

            if (!isInBuildLogic) { // BuildScanExtension is only available in the gradle project
                val infoCollectedInBuildLogic = gradleRootProject.extensions.extraProperties.get("collectedInfo-${klass.simpleName}-build-logic")!!

 */

/**
 * Provides support for Maven core extensions configuration and management.
 *
 * <p>This package contains classes for:</p>
 * <ul>
 *   <li>Extension configuration model</li>
 *   <li>Extension loading and validation</li>
 *   <li>Extension lifecycle management</li>
 * </ul>
 *
 * @since 4.0.0
 */

import org.apache.maven.api.cli.extensions.CoreExtension;

import static java.util.Objects.requireNonNull;

/**
 * Represents the list of core extensions configured at one source. The list is validated (are GA unique), but no
 * other logic than that is applied.
 *
 * @since 4.0.0
 * @param source The source file of core extensions, is never {@code null}.

 * under the License.
 */
package org.apache.maven.cling.extensions;

import org.apache.maven.api.cli.extensions.CoreExtension;

/**
 * Exception occurring trying to resolve a plugin.
 *
 */
public class ExtensionResolutionException extends Exception {

    private final CoreExtension extension;

    public ExtensionResolutionException(CoreExtension extension, Throwable cause) {
        super(

private
fun writeExtensionsTo(outputFile: File, packageName: String, targetType: ApiType, extensions: List<KotlinExtensionFunction>): Unit =
    outputFile.bufferedWriter().use { writer ->
        writer.write(fileHeaderFor(packageName, isIncubatingFileClass(targetType, extensions)))
        writer.write("\n")
        extensions.forEach {
            writer.write("\n${it.toKotlinString()}")
        }
    }


/**

   * <<<{{{./apidocs/org/apache/maven/api/cli/mvnup/package-summary.html}mvnup}}>>>, the Maven Upgrade tool.

 This API also defines {{{./core-extensions.html}Core Extensions model}} for <<<.mvn/extensions.xml>>>.

  <id>extension</id>
  <name>ExtensionDescriptor</name>
  <description><![CDATA[
    Extension descriptor, stored in <code>META-INF/maven/extension.xml</code> in an extension's jar artifact to
    precisely control parts of the extension and dependencies to expose in the API class loader.