for (ModelProblem modelProblem : result1.getProblems()) {
                problemsList.add(modelProblem);
            }
        }

        return success(model, problemsList);
    }

    /**
     * Error with problems describing the cause
     *
     * @param problems
     */
    public static <T> Result<T> error(Iterable<? extends ModelProblem> problems) {
        return error(null, problems);

public interface ModelProblemCollector {

    ProblemCollector<ModelProblem> getProblemCollector();

    default boolean hasErrors() {
        return getProblemCollector().hasErrorProblems();
    }

    default boolean hasFatalErrors() {
        return getProblemCollector().hasFatalProblems();
    }

    default void add(BuilderProblem.Severity severity, ModelProblem.Version version, String message) {

        List<ProjectBuildingResult> results = new ArrayList<>();

        List<ModelProblem> problems1 = new ArrayList<>();
        Collections.addAll(
                problems1,
                new DefaultModelProblem(
                        "Missing required dependency",
                        ModelProblem.Severity.ERROR,
                        null,
                        "pom.xml",
                        25,

 * under the License.
 */
package org.apache.maven.project;

import java.io.File;
import java.util.Collections;
import java.util.List;

import org.apache.maven.model.building.ModelProblem;

/**
 * Collects the output of the project builder.
 *
 * @deprecated use {@code org.apache.maven.api.services.ProjectBuilder} instead
 */
@Deprecated(since = "4.0.0")

import org.apache.maven.model.building.ModelProblem.Severity;
import org.apache.maven.model.building.ModelProblem.Version;

/**
 * Class to wrap request parameters to ModelProblemCollector.addProblem
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public final class ModelProblemCollectorRequest {

    private final ModelProblem.Severity severity;

        long errorProblems = 0;

        for (ProjectBuildingResult result : results) {
            List<ModelProblem> problems = result.getProblems();
            totalProblems += problems.size();

            for (ModelProblem problem : problems) {
                if (problem.getSeverity() != ModelProblem.Severity.WARNING) {
                    errorProblems++;
                }
            }
        }

        }

        private static org.apache.maven.model.building.ModelProblem convert(ModelProblem p) {
            return new DefaultModelProblem(
                    p.getMessage(),
                    org.apache.maven.model.building.ModelProblem.Severity.valueOf(
                            p.getSeverity().name()),
                    org.apache.maven.model.building.ModelProblem.Version.valueOf(
                            p.getVersion().name()),

     * @deprecated Use {@link #ModelBuildingException(ModelBuildingResult)} instead.
     */
    @Deprecated
    public ModelBuildingException(Model model, String modelId, List<ModelProblem> problems) {
        super(toMessage(modelId, problems));

        if (model != null) {
            DefaultModelBuildingResult tmp = new DefaultModelBuildingResult();
            if (modelId == null) {

                        for (ModelProblem modelProblem : problems) {
                            message.append(String.format(
                                    "\n* %s @ %s",
                                    modelProblem.getMessage(), ModelProblemUtils.formatLocation(modelProblem, null)));
                        }
                        logger.warn(message.toString());

        } else {
            this.activeExternalProfiles.clear();
        }

        return this;
    }

    @Override
    public List<ModelProblem> getProblems() {
        return problems;
    }

    public DefaultModelBuildingResult setProblems(List<ModelProblem> problems) {
        if (problems != null) {
            this.problems = new ArrayList<>(problems);
        } else {
            this.problems.clear();