*
     * @return The external profiles that should be considered for model building, never {@code null}.
     */
    List<Profile> getProfiles();

    /**
     * Sets the external profiles that should be considered for model building.
     *
     * @param profiles The external profiles that should be considered for model building, may be {@code null}.

public interface SettingsBuilder extends Service {

    /**
     * Builds the effective settings of the specified settings files.
     *
     * @param request the settings building request that holds the parameters, must not be {@code null}
     * @return the result of the settings building, never {@code null}
     * @throws SettingsBuilderException if the effective settings could not be built
     */
    @Nonnull

    Model getEffectiveModel();

    /**
     * Gets the profiles that were active during model building.
     *
     * @return The active profiles of the model or an empty list if the model has no active profiles.
     */
    @Nonnull
    List<Profile> getActivePomProfiles();

    /**
     * Gets the profiles that were active during model building for a specific model in the hierarchy.

     * The model building request passed to this method must be the same as the one used for the first phase of the
     * model building.
     *
     * @param request The model building request that holds the parameters, must not be {@code null}.
     * @param result The interim result of the first phase of model building, must not be {@code null}.

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.toolchain.building;

import java.util.Collections;

import org.apache.maven.building.Problem;
import org.apache.maven.building.ProblemCollector;
import org.apache.maven.building.ProblemCollectorFactory;
import org.junit.jupiter.api.Test;

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

/**
 * A pluggable service for processing model objects during model building.
 *
 * <p>This service allows implementations to:</p>
 * <ul>
 *   <li>Pool identical objects to reduce memory footprint</li>
 *   <li>Intern objects for faster equality comparisons</li>
 *   <li>Apply custom optimization strategies</li>
 *   <li>Transform or modify objects during building</li>
 * </ul>
 *

    /**
     * Functional interface for building XContent with custom logic.
     * Allows clients to provide custom content building implementations.
     */
    public interface XContentBuilderCallback {
        /**
         * Applies custom logic to build XContent using the provided builder and parameters.
         *
         * @param builder the XContentBuilder to use for building content

                // if we're in the process of building up another arg, push it and start over.
                // this is for the case: "-Dfoo=bar "-Dfoo2=bar two" (note the first unterminated quote)
                if (currentArg != null) {
                    cleaned.add(currentArg.toString());
                }

                // start building an argument here.

public interface SettingsBuilder {

    /**
     * Builds the effective settings of the specified settings files.
     *
     * @param request The settings building request that holds the parameters, must not be {@code null}.
     * @return The result of the settings building, never {@code null}.
     * @throws SettingsBuildingException If the effective settings could not be built.
     */

     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link SettingsProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link SettingsBuildingException}.
     *
     * @return The problems that were encountered during the settings building, can be empty but never {@code null}.
     */