*
     * @return the exception that caused this problem or {@code null} if not applicable
     */
    @Nullable
    Exception getException();

    /**
     * Gets the message that describes this problem.
     *
     * @return the message describing this problem, never {@code null}
     */
    @Nonnull
    String getMessage();

    /**
     * Gets the severity level of this problem.
     *

        if (!(isSameGroupAndVersion && validArtifactId)) {
            String message;
            if (isMultiModule) {
                // Multi-module project: artifactId may match any declared module name
                message = String.format(
                        "Cannot attach artifact to project: groupId and version must match the project, "

    }

    private void println(String event, String message) {
        print(event, message);
        out.println();
    }

    private void print(String event, String message) {
        out.print("Aether Transfer - " + event);
        if (message != null) {
            out.print(": ");
            out.print(message);
        }
    }

import org.apache.maven.api.annotations.Experimental;

@Experimental
public class ChecksumAlgorithmServiceException extends MavenException {

    public ChecksumAlgorithmServiceException(String message, Throwable cause) {
        super(message, cause);
    }

see [this guide](./platforms/documentation/docs/README.md).

### Creating commits and writing commit messages

The commit messages that accompany your code changes are an important piece of documentation. Please follow these guidelines when creating commits:

* [Write good commit messages.](https://cbea.ms/git-commit/#seven-rules)

 * settings.
 */
public class MissingProfilesException extends Exception {
    public MissingProfilesException(String message) {
        super(message);
    }

    private final LinkedList<String> contextStack = new LinkedList<String>();

    @Override
    public void warning(String message) {
        LOGGER.warn(String.format("%s: %s", contextStack.getFirst(), message));
    }

    @Override
    public void start(String context) {
        contextStack.addFirst(context);
    }

    @Override
    public void finish() {

@Contextual
public class DocGenerationException extends RuntimeException {
    public DocGenerationException(String message) {
        super(message);
    }

    public DocGenerationException(String message, Throwable throwable) {
        super(message, throwable);
    }

      if (overWaitUnits > 0) {
        message += overWaitUnits + " " + unitString;
        if (shouldShowExtraNanos) {
          message += ",";
        }
        message += " ";
      }
      if (shouldShowExtraNanos) {
        message += overWaitLeftoverNanos + " nanoseconds ";
      }

      message += "delay)";
    }

        super(message, cause);
        this.result = result;
        this.detailMessage = prepareDetailMessage(message, result);
    }

    private static String prepareDetailMessage(String message, DependencyResolutionResult result) {
        StringBuilder msg = new StringBuilder(message);
        msg.append(System.lineSeparator());