private InvalidVersionSpecificationException cause;

    public VersionNotFoundException(
            String projectId, Dependency dependency, File pomFile, InvalidVersionSpecificationException cause) {
        super(
                projectId + ", " + formatLocationInPom(dependency) + " " + dependency.getVersion() + ", pom file "
                        + pomFile,
                cause);

        this.projectId = projectId;

    assertThat(expected).hasCauseThat().isEqualTo(cause);

    Object newValue = new Object();
    valueRef.set(newValue);
    assertThat(cache.getUnchecked(new Object())).isSameInstanceAs(newValue);
  }

  public void testGetUnchecked_unchecked() {
    RuntimeException cause = new RuntimeException();
    AtomicReference<Object> valueRef = new AtomicReference<>();
    LoadingCache<Object, Object> cache =

     *
     * @param message
     * @param cause
     * @since 2.0.9
     */
    public MojoFailureException(String message, Throwable cause) {
        super(message, cause);
    }

    /**
     * Constructs a new {@code MojoFailureException} exception wrapping an underlying {@code Throwable}.
     *
     * @param cause the cause which is saved for later retrieval by the {@link #getCause()} method.

    }

    /**
     * Creates a new exception with specified cause
     *
     * @param cause
     * @param groupId
     * @param artifactId
     * @param version
     */
    public UnresolvableModelException(Throwable cause, String groupId, String artifactId, String version) {
        super(cause);
        this.groupId = groupId;
        this.artifactId = artifactId;

            String locationInPom,
            String offendingVersion,
            File pomFile,
            InvalidVersionSpecificationException cause) {
        super(projectId, formatMessage(projectId, locationInPom, offendingVersion, cause), pomFile, cause);
        this.locationInPom = locationInPom;
        this.offendingVersion = offendingVersion;
    }

    private static String formatMessage(

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

  public static final class TwoArgConstructorRuntimeException extends RuntimeException {
    public TwoArgConstructorRuntimeException(String message, Throwable cause) {
      super(message, cause);
    }
  }

  public static final class ExceptionWithPrivateConstructor extends Exception {

     * @param message the detail message explaining the cause of the exception
     */
    public InvokerException(@Nullable String message) {
        super(message);
    }

    /**
     * Constructs a new {@code InvokerException} with the specified detail message and cause.
     *
     * @param message the detail message explaining the cause of the exception
     * @param cause the underlying cause of the exception
     */

        super(message, cause);

        this.project = project;
        pluginGroupId = plugin.getGroupId();
        pluginArtifactId = plugin.getArtifactId();
        pluginVersion = plugin.getVersion();
    }

    public PluginManagerException(Plugin plugin, String message, Throwable cause) {
        super(message, cause);

        pluginGroupId = plugin.getGroupId();

        this(message, -1, -1, cause);
    }

    public ModelParserException(String message, int lineNumber, int columnNumber, Throwable cause) {
        super(message, cause);
        this.lineNumber = lineNumber;
        this.columnNumber = columnNumber;
    }

    public ModelParserException(Throwable cause) {
        this(null, cause);
    }

	APICode string // The API error code identifying the error
	Err     string // The error message returned to the client
	Cause   error  // Optional, lower level error cause.
}

func (e Error) Error() string {
	if e.Cause == nil {
		return e.Err
	}
	return fmt.Sprintf("%s: %v", e.Err, e.Cause)
}

func errKeyCreationFailed(err error) Error {
	return Error{
		Code:    http.StatusInternalServerError,