* or a simple string message. In addition, a problem carries a hint about its source, e.g. the POM file that exhibits
 * the problem.
 *
 */
public interface ModelProblem extends BuilderProblem {

    /**
     * Enumeration of model versions that can be validated.
     * These versions correspond to different levels of validation that can be applied
     * during model building, based on the POM schema version.

import org.apache.maven.api.annotations.Nullable;
import org.apache.maven.api.cli.InvokerRequest;
import org.apache.maven.api.cli.Logger;
import org.apache.maven.api.cli.mvn.MavenOptions;
import org.apache.maven.api.services.BuilderProblem;
import org.apache.maven.api.services.Lookup;
import org.apache.maven.api.services.Sources;
import org.apache.maven.api.services.ToolchainsBuilder;
import org.apache.maven.api.services.ToolchainsBuilderRequest;

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

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

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

import org.apache.maven.api.cli.Logger;
import org.apache.maven.api.cli.cisupport.CIInfo;
import org.apache.maven.api.cli.logging.AccumulatingLogger;
import org.apache.maven.api.services.BuilderProblem;
import org.apache.maven.api.services.Lookup;
import org.apache.maven.api.services.MavenException;
import org.apache.maven.api.services.MessageBuilder;
import org.apache.maven.api.services.SettingsBuilder;