callerInfo = new NullPointerException().getStackTrace()[2];

        Runnable warning = this::maybeWarnAboutCleanUp;

        cleanupWarning = new Thread(warning);

        Runtime.getRuntime().addShutdownHook(cleanupWarning);
    }

    private void maybeWarnAboutCleanUp() {
        if (warnAboutCleanup) {
            System.out.println("[WARNING] TestFileManager from: " + callerInfo.getClassName() + " not cleaned up!");
        }

                        loc != null ? loc.getColumnNumber() : -1,
                        e,
                        e.getMessage(),
                        BuilderProblem.Severity.WARNING));
            }
        } catch (XmlReaderException e) {
            Location loc = e.getCause() instanceof XMLStreamException xe ? xe.getLocation() : null;
            problems.add(new DefaultBuilderProblem(

        if (context == null) {
            return null;
        }
        return context.get(key);
    }

    /**
     * Sets the project's class realm. <strong>Warning:</strong> This is an internal utility method that is only public
     * for technical reasons, it is not part of the public API. In particular, this method can be changed or deleted

    @Override
    public boolean isWarnEnabled() {
        return logger.isLoggable(Level.WARNING);
    }

    @Override
    public void warn(final String message) {
        logger.logp(Level.WARNING, sourceClass, null, message);
    }

    @Override
    public void warn(final String message, final Throwable t) {
        logger.logp(Level.WARNING, sourceClass, null, message, t);
    }

    @Override

    @Nonnull
    PersistedToolchains getEffectiveToolchains();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link ToolchainsBuilderException}.
     *

                addViolation(problems, BuilderProblem.Severity.WARNING, "localRepository", null, msgS);
            }
            if (!settings.isInteractiveMode()) {
                addViolation(problems, BuilderProblem.Severity.WARNING, "interactiveMode", null, msgS);
            }
            if (settings.isOffline()) {
                addViolation(problems, BuilderProblem.Severity.WARNING, "offline", null, msgS);
            }

                    // still unreadable even in non-strict mode, rethrow original error
                    throw e;
                }

                Severity severity = request.isProjectBuild() ? Severity.ERROR : Severity.WARNING;
                problems.add(
                        severity,
                        ModelProblem.Version.V20,
                        "Malformed POM " + modelSource.getLocation() + ": " + e.getMessage(),

                            loc != null ? loc.getColumnNumber() : -1,
                            e,
                            e.getMessage(),
                            BuilderProblem.Severity.WARNING));
                }
            }
        } catch (XmlReaderException e) {
            Location loc = e.getCause() instanceof XMLStreamException xe ? xe.getLocation() : null;

                        }
                    }
                } catch (final Exception e) {
                    logger.log(Level.WARNING, e, () -> {
                        final String canonicalPath = possibleJar.getCanonicalPath();
                        return "Failed to read " + canonicalPath;
                    });
                }
            }

    private SetView() {} // no subclasses but our own

    /**
     * Returns an immutable copy of the current contents of this set view. Does not support null
     * elements.
     *
     * <p><b>Warning:</b> this may have unexpected results if a backing set of this view uses a
     * nonstandard notion of equivalence, for example if it is a {@link TreeSet} using a comparator