MavenProperties properties;
        if (props instanceof MavenProperties mavenProperties) {
            properties = mavenProperties;
        } else {
            properties = new MavenProperties();
            properties.putAll(props);
        }
        return update(properties);
    }

    public boolean update(MavenProperties properties) {
        boolean modified = false;

     * where the property value is defined.
     */
    enum Source {
        /**
         * Maven system properties. These properties are evaluated very early during the boot process,
         * typically set by Maven itself and flagged as readOnly=true or by users via maven-system.properties files.
         * System properties are initialized before the build starts and are available throughout the entire Maven

        }

        /**
         * Writes [Properties] to a file, but without including the timestamp comment.
         *
         * See [PropertiesUtils.store].
         */
        fun store(properties: Properties, file: File, comment: String? = null) {
            PropertiesUtils.store(properties, file, comment, Charsets.ISO_8859_1, "\n")
        }

        private

    }

    /**
     * Returns a map of user-defined properties for the Maven execution.
     * These properties can be set using the -D command-line option.
     *
     * @return an unmodifiable map of user properties
     */
    @Nonnull
    Map<String, String> userProperties();

    /**
     * Returns a map of system properties for the Maven execution.

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 */
@Deprecated
public abstract class AbstractModelInterpolatorTest {
    private Properties context;

    @BeforeEach
    public void setUp() {
        context = new Properties();
        context.put("basedir", "myBasedir");
        context.put("project.baseUri", "myBaseUri");
    }

      </activation>
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      </properties>
    </profile>
    <profile>
      <id>file</id>
      <activation>
        <file>
          <exists>simple.xml</exists>
        </file>
      </activation>
      <properties>
        <profile.file>activated</profile.file>
      </properties>
    </profile>
  </profiles>

     * Parses a sequence of XML elements and converts them to the appropriate {@link Properties} type.
     *
     * @param parser The XML parser
     * @return Converted Properties instance
     */
    private static Properties parseProperties(final XmlPullParser parser) throws Exception {
        final Properties properties = newImplementation(parser, Properties.class);
        while (parser.nextTag() == XmlPullParser.START_TAG) {

        }

        return this;
    }

    @Override
    public Properties getSystemProperties() {
        if (systemProperties == null) {
            systemProperties = new Properties();
        }

        return systemProperties;
    }

    @Override
    public DefaultModelBuildingRequest setSystemProperties(Properties systemProperties) {
        if (systemProperties != null) {

    }

    private
    fun store(properties: Properties) {
        PropertiesUtils.store(
            properties, libraryVersionFile.get().asFile,
            "Generated file, please do not edit - Version values used in build-init templates",
            Charsets.ISO_8859_1, "\n"
        )
    }

    private
    fun findLatest(name: String, notation: String, dest: Properties) {

        this.userProperties = userProperties;
        return this;
    }

    @Override
    public Properties getUserProperties() {
        if (userProperties == null) {
            userProperties = new Properties();
        }

        return userProperties;
    }

    @Override
    public Properties getExecutionProperties() {