import org.apache.maven.project.MavenProject;

/**
 * Lifecycle mapping delegate component interface. Calculates project build execution plan given {@link Lifecycle} and
 * lifecycle phase. Standard lifecycles use plugin execution {@code <phase>} or mojo default lifecycle phase to
 * calculate the execution plan, but custom lifecycles can use alternative mapping strategies.
 */
@Named(DefaultLifecycleMappingDelegate.HINT)
@Singleton

                    phase("generate-sources"),
                    phase("process-sources"),
                    phase("generate-resources"),
                    phase("process-resources"),
                    phase("compile"),
                    phase("process-classes"),
                    phase("generate-test-sources"),
                    phase("process-test-sources"),
                    phase("generate-test-resources"),

            <id>b</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>a</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>d</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>c</id>
            <phase>validate</phase>
          </execution>
          <execution>

        <executions>
          <execution>
            <!-- NOTE: Explicitly reference "default" id here -->
            <id>default</id>
            <phase>child-default</phase>
          </execution>
          <execution>
            <id>non-default</id>
            <phase>child-non-default</phase>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

        <executions>
          <execution>
            <id>parent-1</id>
            <phase>validate</phase>
            <goals>
              <goal>parent-1</goal>
            </goals>
          </execution>
          <execution>
            <id>parent-2</id>
            <phase>validate</phase>
            <goals>
              <goal>parent-2</goal>
            </goals>
          </execution>

        <executions>
          <execution>
            <id>child-1</id>
            <phase>validate</phase>
            <goals>
              <goal>child-1</goal>
            </goals>
          </execution>
          <execution>
            <id>child-2</id>
            <phase>validate</phase>
            <goals>
              <goal>child-2</goal>
            </goals>
          </execution>

        <executions>
          <execution>
            <id>child-1</id>
            <phase>validate</phase>
            <goals>
              <goal>child-1</goal>
            </goals>
          </execution>
          <execution>
            <id>child-2</id>
            <phase>validate</phase>
            <goals>
              <goal>child-2</goal>
            </goals>
          </execution>

    }

    @Test
    void testSet() {
        LifecyclePhase phase = new LifecyclePhase();
        assertNull(phase.getMojos());

        phase.set("");
        assertNotNull(phase.getMojos());
        assertEquals(0, phase.getMojos().size());

        phase.set("jar:jar, war:war");

        List<LifecycleMojo> mojos = phase.getMojos();
        assertNotNull(mojos);

     * Collection of phases for this lifecycle
     */
    Collection<Phase> phases();

    /**
     * Pre-ordered list of phases.
     * If not provided, a default order will be computed.
     */
    default Optional<List<String>> orderedPhases() {
        return Optional.empty();
    }

    /**
     * A phase in the lifecycle.
     */
    interface Phase {
        String name();

        List<Plugin> plugins();

        <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>