}

    @Nonnull
    default DependencyCoordinates create(@Nonnull Session session, Plugin plugin) {
        // TODO: hard coded string
        return create(DependencyCoordinatesFactoryRequest.build(
                session, plugin.getGroupId(), plugin.getArtifactId(), plugin.getVersion(), null, null, "maven-plugin"));
    }

    @Nonnull

 */
package org.apache.maven.plugin;

import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.model.Plugin;
import org.apache.maven.project.MavenProject;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.graph.DependencyFilter;
import org.eclipse.aether.repository.RemoteRepository;

/**

      <version>1.0</version>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-antrun-plugin</artifactId>
        <configuration>
          <tasks><echo>${project.parent.basedir}</echo></tasks>
        </configuration>
      </plugin>
    </plugins>
  </build>

 * under the License.
 */
package org.apache.maven.plugin.version;

import org.eclipse.aether.repository.ArtifactRepository;

/**
 * Describes the result of a plugin version resolution request.
 *
 * @since 3.0
 */
public interface PluginVersionResult {

    /**
     * The resolved plugin version.
     *
     * @return The resolved plugin version, never {@code null}.
     */
    String getVersion();

For external plugins, it's difficult for an object to be used outside the application of a plugin, so following best practices is relatively straightforward.  For core plugins in gradle/gradle, it's easy for an object to be created without applying its associated plugin. For instance, Spring has a plugin that uses the Checkstyle task directly without applying the Checkstyle plugin.

     * Creates a new class realm for the specified plugin.
     *
     * @param plugin The plugin for which to create a realm, must not be {@code null}.
     * @param parent The parent realm for the new realm, may be {@code null}.
     * @param parentImports The packages/types to import from the parent realm, may be {@code null}.
     * @param foreignImports The packages/types to import from foreign realms, may be {@code null}.

      <groupId>com.squareup.okhttp3</groupId>
      <artifactId>logging-interceptor</artifactId>
    </dependency>
  </dependencies>

  <reporting>
    <plugins>
      <plugin>
        <artifactId>maven-project-info-reports-plugin</artifactId>
      </plugin>
    </plugins>
  </reporting>

  <artifactId>mng6300-war</artifactId>
  <packaging>war</packaging>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <configuration>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <dependencies>
    <dependency>

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

import java.util.List;
import java.util.Map;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.model.Plugin;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.eclipse.aether.RepositorySystemSession;

        <!-- That's the boolean POM field we would like to interpolate -->
        <filtering>${filter.resources}</filtering>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin-expression</artifactId>
        <version>2.1-SNAPSHOT</version>
        <configuration>
          <outputFile>target/expression.properties</outputFile>