}

    public String getRequiredJavaVersion() {
        return requiredJavaVersion;
    }

    public void setPlugin(Plugin plugin) {
        this.plugin = plugin;
    }

    public Plugin getPlugin() {
        return plugin;
    }

    public Artifact getPluginArtifact() {
        return pluginArtifact;
    }

    use 9999.0-....
  </description>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-source-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>animal-sniffer-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <artifactId>maven-javadoc-plugin</artifactId>
        <executions>
          <execution>

        "process-test-resources",
                "org.apache.maven.plugins:maven-resources-plugin:" + RESOURCES_PLUGIN_VERSION + ":testResources",
        "test-compile", "org.apache.maven.plugins:maven-compiler-plugin:" + COMPILER_PLUGIN_VERSION + ":testCompile",
        "test", "org.apache.maven.plugins:maven-surefire-plugin:" + SUREFIRE_PLUGIN_VERSION + ":test",

/**
 * Tests {@code Plugin}.
 *
 */
class PluginTest {

    @Test
    void testHashCodeNullSafe() {
        new Plugin().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Plugin().equals(null));

        new Plugin().equals(new Plugin());
    }

    @Test
    void testEqualsIdentity() {
        Plugin thing = new Plugin();

        if (build != null) {
            List<Plugin> plugins = build.getPlugins();
            Map<Object, Plugin> normalized = new LinkedHashMap<>(plugins.size() * 2);

            for (Plugin plugin : plugins) {
                Object key = plugin.getKey();
                Plugin first = normalized.get(key);
                if (first != null) {
                    merger.mergePlugin(plugin, first);
                }

            }

            if ( !found )
            {
                Plugin mappedPlugin = new Plugin();

                mappedPlugin.setArtifactId( plugin.getArtifactId() );

                mappedPlugin.setPrefix( plugin.getPrefix() );

                mappedPlugin.setName( plugin.getName() );

                addPlugin( mappedPlugin );

                changed = true;
            }

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <version>1.0</version</version>

              <params>
                <param>packageModelV4=org.apache.maven.api.plugin.descriptor.lifecycle</param>
              </params>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <excludes>

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.

            xml.append("    </dependencies>\n");
        }

        if (!plugins.isEmpty()) {
            xml.append("    <build>\n");
            xml.append("        <plugins>\n");
            for (Plugin plugin : plugins) {
                xml.append("            <plugin>\n");
                xml.append("                <groupId>").append(plugin.groupId).append("</groupId>\n");
                xml.append("                <artifactId>")