<build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.its.plugins</groupId>
          <artifactId>maven-it-plugin-class-loader</artifactId>
          <version>2.1-SNAPSHOT</version>
          <dependencies>
            <dependency>
              <groupId>org.apache.maven.its.mng3906</groupId>
              <artifactId>e</artifactId>
              <version>0.1</version>

    <parent>
        <groupId>org.example</groupId>
        <artifactId>parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath>./parent-pom.xml</relativePath>
    </parent>

    <artifactId>child</artifactId>
    <packaging>jar</packaging>

    <build>
        <plugins>
            <plugin>
                <groupId>${codehaus.groupId}</groupId>

  <artifactId>aid</artifactId>
  <groupId>gid</groupId>
  <version>0.1</version>

  <dependencies>
    <dependency>
      <groupId>test</groupId>
      <artifactId>a</artifactId>
      <version>0.2</version>
      <scope>system</scope>
      <systemPath>${basedir}/lib/a.jar</systemPath>
    </dependency>
    <dependency>
      <groupId>test</groupId>
      <artifactId>b</artifactId>

    <modelVersion>4.0.0</modelVersion>

    <groupId>org.junit</groupId>
    <artifactId>bom</artifactId>
    <version>0.1</version>
    <packaging>pom</packaging>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.junit</groupId>
                <artifactId>junit</artifactId>
                <version>0.1</version>

    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <codehaus.groupId>org.codehaus.mojo</codehaus.groupId>
    </properties>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>${codehaus.groupId}</groupId>

  </description>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin-class-loader</artifactId>
        <version>2.1-SNAPSHOT</version>
        <dependencies>
          <dependency>
            <groupId>org.apache.maven.its.mng3906</groupId>
            <artifactId>c</artifactId>
            <version>0.1</version>
          </dependency>

    public UnresolvableModelException(
            String message, String groupId, String artifactId, String version, Throwable cause) {
        super(message, cause);
        this.groupId = (groupId != null) ? groupId : "";
        this.artifactId = (artifactId != null) ? artifactId : "";
        this.version = (version != null) ? version : "";
    }

    /**
     * Creates a new exception with specified detail message.
     *

    }

    @Override
    public Object get(String groupId, String artifactId, String version, String tag) {
        return cache.get(session, new Key(groupId, artifactId, version, tag));
    }

    @Override
    public void put(String groupId, String artifactId, String version, String tag, Object data) {
        cache.put(session, new Key(groupId, artifactId, version, tag), data);
    }

    static class Key {

<project>
  <modelVersion>4.0.0</modelVersion>

  <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>

-->

<project>
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven.its.mng6300</groupId>
    <artifactId>test</artifactId>
    <version>1.0</version>
  </parent>
  <artifactId>mng6300-war</artifactId>
  <packaging>war</packaging>

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