return "Deleted " + count + " thumbnail files.";
        } catch (final Exception e) {
            logger.error("Failed to purge thumbnails.", e);
            return e.getMessage();
        }
    }

    public long getExpiry() {
        return expiry;
    }

    public PurgeThumbnailJob expiry(final long expiry) {
        if (expiry > 0) {
            this.expiry = expiry;

                        "Could not find artifact org.apache.maven.its:dep-mng5459:pom:0.4.0-20130404.090532-2 in repo ("
                                + newTestRepository().getUrl() + ")",
                        evt.getException().getMessage());
                missingArtifactDescriptor = true;
            }
        }

        assertTrue(
                missingArtifactDescriptor,

            } catch (InvalidVersionSpecificationException e) {
                throw new ProfileActivationException(
                        "Invalid JDK version in profile '" + profile.getId() + "': " + e.getMessage());
            }
        }

        boolean reverse = false;

        if (jdk.startsWith("!")) {
            reverse = true;
            jdk = jdk.substring(1);
        }

        for (BuilderProblem problem : list) {
            addViolation(problems, Severity.valueOf(problem.getSeverity().name()), problem.getMessage());
        }
    }

    // ----------------------------------------------------------------------
    // Field validation
    // ----------------------------------------------------------------------

        writer.println();

        for (Problem problem : problems) {
            writer.print("[");
            writer.print(problem.getSeverity());
            writer.print("] ");
            writer.print(problem.getMessage());
            String location = problem.getLocation();
            if (!location.isEmpty()) {
                writer.print(" @ ");
                writer.print(location);
            }
            writer.println();

            .put("one", 1); // throwing on this line would be even better

    IllegalArgumentException expected =
        assertThrows(IllegalArgumentException.class, () -> builder.build());
    assertThat(expected.getMessage()).contains("one");
  }

  public void testOf() {
    assertMapEquals(ImmutableBiMap.of("one", 1), "one", 1);
    assertMapEquals(ImmutableBiMap.of("one", 1).inverse(), 1, "one");

        try {
            return CommonsCliMavenOptions.parse(source, args.toArray(new String[0]));
        } catch (ParseException e) {
            throw new ParserException("Failed to parse source " + source + ": " + e.getMessage(), e.getCause());
        }
    }

    @Override
    protected MavenOptions assembleOptions(List<MavenOptions> parsedOptions) {
        return LayeredMavenOptions.layerMavenOptions(parsedOptions);
    }

            if (logger.isDebugEnabled()) {
                logger.debug(e.getMessage(), e);
            }
            throwValidationErrorApi(e.getMessageCode());
        } catch (final ResultOffsetExceededException e) {
            if (logger.isDebugEnabled()) {
                logger.debug(e.getMessage(), e);
            }

        return crawlingInfo;
    }

    public String getKeyMsg() {
        final Locale locale = ComponentUtil.getRequestManager().getUserLocale();
        final String message = ComponentUtil.getMessageManager().getMessage(locale, "labels.crawling_info_" + getKey());
        if (message == null || message.startsWith("???")) {
            return getKey();
        }
        return message;
    }

    @Override

    }

    public void artifactDescriptorInvalid(RepositoryEvent event) {
        println(
                "artifactDescriptorInvalid",
                "for " + event.getArtifact() + ": " + event.getException().getMessage());
    }

    public void artifactDescriptorMissing(RepositoryEvent event) {
        println("artifactDescriptorMissing", "for " + event.getArtifact());
    }