assertEquals(Problem.Severity.ERROR, problems.get(0).getSeverity(), "First problem should be ERROR");
        assertEquals("Error message", problems.get(0).getMessage(), "First problem should have correct message");
        assertEquals(Problem.Severity.WARNING, problems.get(1).getSeverity(), "Second problem should be WARNING");
    }

        assertEquals(Severity.ERROR, p1.getSeverity());
        assertEquals("MESSAGE1", p1.getMessage());
        assertEquals(-1, p1.getLineNumber());
        assertEquals(-1, p1.getColumnNumber());
        assertNull(p1.getException());

        Problem p2 = collector.getProblems().get(1);
        assertEquals(Severity.WARNING, p2.getSeverity());
        assertEquals("", p2.getMessage());

            }
        }

        return msg;
    }

    @Override
    public Severity getSeverity() {
        return severity;
    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(128);

        buffer.append('[').append(getSeverity()).append("] ");
        buffer.append(getMessage());
        String location = getLocation();

            }
        }

        return msg;
    }

    @Override
    public Severity getSeverity() {
        return severity;
    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(128);

        buffer.append('[').append(getSeverity()).append("] ");
        buffer.append(getMessage());
        String location = getLocation();

        this.severity = Objects.requireNonNull(severity, "severity cannot be null");
        this.version = Objects.requireNonNull(version, "version cannot be null");
    }

    public Severity getSeverity() {
        return severity;
    }

    public Version getVersion() {
        return version;
    }

    public Exception getException() {
        return exception;
    }

        return msg;
    }

    @Override
    public Severity getSeverity() {
        return severity;
    }

    @Override
    public Version getVersion() {
        return version;
    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(128);

        buffer.append('[').append(getSeverity()).append("] ");
        buffer.append(getMessage());

     */
    String getMessage();

    /**
     * Gets the severity level of this problem.
     *
     * @return The severity level of this problem, never {@code null}.
     */
    Severity getSeverity();

     */
    String getMessage();

    /**
     * Gets the severity level of this problem.
     *
     * @return The severity level of this problem, never {@code null}.
     */
    Severity getSeverity();

                            return problem.getMessage();
                        }

                        @Override
                        public Severity getSeverity() {
                            return Severity.valueOf(problem.getSeverity().name());
                        }
                    };
                }

                @Nonnull
                @Override

    @Nonnull
    String getMessage();

    /**
     * Gets the severity level of this problem.
     *
     * @return the severity level of this problem, never {@code null}
     */
    @Nonnull
    Severity getSeverity();

    /**
     * The different severity levels for a problem, in decreasing order.
     *
     * @since 4.0.0
     */
    @Experimental
    enum Severity {
        FATAL, //
        ERROR, //