}
        return false;
    }

    private boolean extractIsolatedRealm(PlexusConfiguration c) {
        String isolatedRealm = c.getChild("isolatedRealm").getValue();

        if (isolatedRealm != null) {
            return Boolean.parseBoolean(isolatedRealm);
        }
        return false;
    }

    private Optional<String> extractRequiredJavaVersion(PlexusConfiguration c) {

<plugin>
  <description>plugin-description</description>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-jar-plugin</artifactId>
  <version>2.3-SNAPSHOT</version>
  <goalPrefix>jar</goalPrefix>
  <isolatedRealm>false</isolatedRealm>
  <inheritedByDefault>true</inheritedByDefault>
  <mojos>
    <mojo>
      <goal>jar</goal>
      <description>mojo-description</description>

                            .artifactId(artifactId)
                            .version(version)
                            .goalPrefix(goalPrefix)
                            .isolatedRealm(isIsolatedRealm())
                            .inheritedByDefault(inheritedByDefault)
                            .requiredJavaVersion(requiredJavaVersion)

        <field>
          <name>goalPrefix</name>
          <version>1.0.0+</version>
          <description></description>
          <type>String</type>
        </field>
        <field>
          <name>isolatedRealm</name>
          <version>1.0.0+</version>
          <description></description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>
        <field>