import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.ModelProblemCollector;

/**
 * Handles expansion of general build plugin configuration into individual executions.
 *
 */
public interface PluginConfigurationExpander {

    /**
     * Merges values from general build plugin configuration into the individual plugin executions of the given model.
     *

        BASE,
        V20,
        V30,
        V31,
        V40
    }

    /**
     * Gets the identifier of the model from which the problem originated. While the general form of this identifier is
     * <code>groupId:artifactId:version</code> the returned identifier need not be complete. The identifier is derived

     */
    public ModelBuilderResult getResult() {
        return result;
    }

    /**
     * Gets the identifier of the POM whose effective model could not be built. The general format of the identifier is
     * {@code <groupId>:<artifactId>:<version>} but some of these coordinates may still be unknown at the point the
     * exception is thrown so this information is merely meant to assist the user.
     *

        return merger.merge(child, parent, false, hints);
    }

    /**
     * Calculates the relative path from the base directory of the parent to the parent directory of the base directory
     * of the child. The general idea is to adjust inherited URLs to match the project layout (in SCM).
     *
     * <p>This calculation is only a heuristic based on our conventions.
     * In detail, the algo relies on the following assumptions: <ul>

  xml.schemaLocation="http://maven.apache.org/xsd/lifecycle-${version}.xsd">
  <id>lifecycle</id>
  <name>Lifecycle</name>
  <description>
    Configuration of custom lifecycle mappings for the plugin, as generally stored in
    {@code META-INF/maven/lifecycle.xml} in a plugin's jar artifact.
  </description>
  <classes>
    <class rootElement="true" xml.tagName="lifecycles" xsd.compositor="sequence">

          </description>
        </field>
        <field>
          <name>family</name>
          <version>1.0.0+</version>
          <type>String</type>
          <description>
            The general family of the OS to be used to activate a profile (e.g. 'windows')
          </description>
        </field>
        <field>
          <name>arch</name>
          <version>1.0.0+</version>

        <executions>
          <execution>
            <id>plugin</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
              <version>2.0.0</version>
              <models>

            project.setOriginalModel(model);
            project.setRemoteArtifactRepositories(Collections.singletonList(new MavenArtifactRepository(
                    "central", "http://repo.maven.apache.org/", new DefaultRepositoryLayout(), null, null)));
        }
        Model model = builder.build(session, project, file);

        assertNotNull(model);
    }

    @Test

          <models />
        </configuration>
        <executions>
          <execution>
            <!-- This step is required to generate xdoc, and does not generate java code -->
            <id>modello-site-doc</id>
            <goals>
              <goal>xdoc</goal>
            </goals>
            <phase>pre-site</phase>
            <configuration>

import org.apache.maven.api.model.Scm;
import org.apache.maven.api.model.Site;
import org.apache.maven.model.v4.MavenMerger;

/**
 * The domain-specific model merger for the Maven POM, overriding generic code from parent class when necessary with
 * more adapted algorithms.
 *
 */
public class MavenModelMerger extends MavenMerger {

    /**