+ Make sure you have a [GitHub account](https://github.com/signup/free).
+ If you're planning to implement a new feature, it makes sense to discuss your changes
  on the [dev list](https://maven.apache.org/mailing-lists.html) first.
  This way you can make sure you're not wasting your time on something that isn't
  considered to be in Apache Maven's scope.
+ Submit a ticket for your issue, assuming one does not already exist.

     */
    void add(Problem.Severity severity, String message, int line, int column, Exception cause);

    /**
     * The next messages will be bound to this source. When calling this method again, previous messages keep
     * their source, but the next messages will use the new source.
     *
     * @param source a source
     */
    void setSource(String source);

    /**
     *

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <!-- Shared parent. Doesn't define a lot of things about Apache like general mailing lists, but does
       define the settings common to all projects at Apache -->
  <groupId>org.apache</groupId>
  <artifactId>apache</artifactId>
  <version>1</version>
  <packaging>pom</packaging>

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <!-- Shared parent. Doesn't define a lot of things about Apache like general mailing lists, but does
       define the settings common to all projects at Apache -->
  <groupId>org.apache</groupId>
  <artifactId>apache</artifactId>
  <version>3</version>
  <packaging>pom</packaging>

    </developer>
  </developers>
  <contributors>
    <contributor>
      <name>parent-contributor</name>
    </contributor>
  </contributors>

  <mailingLists>
    <mailingList>
      <name>parent-mailing-list</name>
    </mailingList>
  </mailingLists>

  <prerequisites>
    <maven>2.0</maven>
  </prerequisites>

  <modules>
    <module>child-1</module>
    <module>child-2</module>
  </modules>

  <groupId>maven.t02</groupId>
  <artifactId>p2</artifactId>
  <packaging>pom</packaging>
  <name>p2</name>
  <version>1.0</version>
  <mailingLists>
    <mailingList>
      <name>mailing-list</name>
    </mailingList>
  </mailingLists>

  <groupId>org.apache.maven.its.mng3843.child</groupId>
  <artifactId>child-2</artifactId>
  <version>0.2</version>
  <packaging>jar</packaging>

  <mailingLists>
    <mailingList>
      <name>child-mailing-list</name>
    </mailingList>
  </mailingLists>

        // ----------------------------------------------------------------------
        // Value taken from p2
        // ----------------------------------------------------------------------

        assertEquals("mailing-list", p4.getMailingLists().get(0).getName());

        // ----------------------------------------------------------------------
        // Value taken from p1

      <timezone>+1</timezone>
      <properties>
        <contributor>yes</contributor>
      </properties>
    </contributor>
  </contributors>

  <mailingLists>
    <mailingList>
      <name>project-mailing-list</name>
      <subscribe>subscribe@</subscribe>
      <unsubscribe>unsubscribe@</unsubscribe>
      <post>post@</post>
      <archive>mail-archive</archive>
      <otherArchives>

Contributing
------------

If you are interested in the development of Maven, please consult the
documentation first and afterward you are welcome to join the developers
mailing list to ask questions or discuss new ideas/features/bugs etc.

Take a look into the [contribution guidelines](CONTRIBUTING.md).

License
-------
This code is under the [Apache License, Version 2.0, January 2004][license].