* We want to make sure that what is ask for in the execution request overrides what is in the settings.
     * The CLI feeds into an execution request so if a particular value is present in the execution request
     * then we will take that over the value coming from the user settings.
     */
    private static Settings adaptSettings(MavenExecutionRequest request) {
        File localRepo = request.getLocalRepositoryPath();

                    T extends ExtensibleEnum, P extends ExtensibleEnumProvider<T>>
            implements ExtensibleEnumRegistry<T> {

        protected final Map<String, T> values;

        DefaultExtensibleEnumRegistry(List<P> providers, T... builtinValues) {
            values = Stream.<T>concat(
                            Stream.of(builtinValues), providers.stream().flatMap(p -> p.provides().stream()))

the description. Description appendValue(java.lang.Object value) Appends an arbitary value to the description. <T> Description appendValueList(java.lang.String start, java.lang.String separator, java.lang.String end, java.lang.Iterable<T> values) Appends a list of values to the description. <T> Description appendValueList(java.lang.String start, java.lang.String separator, java.lang.String end, T... values) Appends a list of values to the description. Methods inherited from class java.lang.Object...

import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.ModelProblemCollector;

/**
 * Replaces expressions of the form <code>${token}</code> with their effective values. Effective values are basically
 * calculated from the elements of the model itself and the execution properties from the building request.
 *
 */
public interface ModelInterpolator {

    /**

            <!-- NOTE: These values are deliberately not in alpha order! -->
            <stringParam>CHILD-1</stringParam>
            <stringParam>CHILD-3</stringParam>
            <stringParam>CHILD-2</stringParam>
            <stringParam>CHILD-4</stringParam>
          </stringParams>
          <listParam combine.children="append">
            <!-- NOTE: These values are deliberately not in alpha order! -->

        <artifactId>maven-it-plugin-configuration</artifactId>
        <version>2.1-SNAPSHOT</version>
        <configuration>
          <!--
          All of these values should override the ones inherited from the parent. In particular, collections should not
          be merged with the values given by the parent POM.
          -->
          <propertiesFile>PASSED</propertiesFile>
          <stringParams>
            <stringParam>PASSED-1</stringParam>

          <artifactId>maven-it-plugin-configuration</artifactId>
          <version>2.1-SNAPSHOT</version>
          <inherited>true</inherited>
          <configuration>
            <listParam>
              <!-- NOTE: These values are deliberately not in alpha order! -->
              <listParam>PARENT-1</listParam>
              <listParam>PARENT-3</listParam>
              <listParam>PARENT-2</listParam>
              <listParam>PARENT-4</listParam>

     * If no module is found, or if module information cannot be extracted, then this constructor
     * builds an empty map.
     *
     * <p>If the {@code resolve} parameter value is {@code false}, then some or all map values may
     * be null instead of the actual module name. This option can avoid the cost of reading module
     * descriptors when only the modules existence needs to be verified.</p>
     *

* ExpressionEvaluator

  Currently, the expression evaluator used to resolve configuration values
  is the DefaultExpressionEvaluator, which is a local variable within the
  implementation of the BasicComponentConfigurator. This ExpressionEvaluator
  simply returns the expression itself as the resolved value, which adds
  very little value to the container. Things like ${project.build.resources}

                            mergedArtifacts.put(conflictId, artifact);
                        }
                    }

                    artifacts = new LinkedHashSet<>(mergedArtifacts.values());
                }

                collectionRequest = new ArtifactResolutionRequest(request);
                collectionRequest.setServers(request.getServers());