*
     * @param settings The settings' string representation, may be empty or {@code null}.
     * @param location The location to report for this use, may be {@code null}.
     */
    public StringSettingsSource(CharSequence settings, String location) {
        super(settings, location);
    }

    /**
     * Gets the character sequence of this settings source.
     *

            if (st.countTokens() > 0) {
                String location;
                do {
                    location = nextLocation(st);
                    if (location != null) {
                        boolean mandatory = true;
                        if (location.startsWith("?")) {
                            mandatory = false;
                            location = location.substring(1);
                        }

     *
     * @param pom The POM's string representation, may be empty or {@code null}.
     * @param location The location to report for this use, may be {@code null}.
     */
    public StringModelSource(CharSequence pom, String location) {
        super(pom, location);
    }

        assertEquals(path, source.getPath());
    }

    @Test
    void testResolvedSourceWithModelId() {
        String location = "/tmp/resolved-pom.xml";
        Path path = Paths.get(location);
        String modelId = "org.apache.maven:maven-core:4.0.0";

        ModelSource source = Sources.resolvedSource(path, modelId);

        assertNotNull(source);

		internalLogOnceIf(GlobalContext, err, "location-constraint-xml-parsing")
		// Treat all other failures as XML parsing errors.
		return "", ErrMalformedXML
	} // else for both err as nil or io.EOF
	location = locationConstraint.Location
	if location == "" {
		location = globalSite.Region()
	}
	if !isValidLocation(location) {
		return location, ErrInvalidRegion
	}

	return location, ErrNone
}

        this.message = message;
        return this;
    }

    public InputLocation getLocation() {
        return location;
    }

    public ModelProblemCollectorRequest setLocation(InputLocation location) {
        this.location = location;
        return this;
    }

        <entry key="checkstyle-version" value="8.42" />
        <entry key="copy-libs" value="false" />
        <entry key="location-0" value="BUNDLED:(bundled):Sun Checks" />
        <entry key="location-1" value="BUNDLED:(bundled):Google Checks" />
        <entry key="location-2" value="PROJECT_RELATIVE:$PROJECT_DIR$/checkstyle_ide.xml:Elasticsearch" />
        <entry key="scan-before-checkin" value="false" />

        add(severity, version, message, null, null);
    }

    default void add(
            BuilderProblem.Severity severity, ModelProblem.Version version, String message, InputLocation location) {
        add(severity, version, message, location, null);
    }

    default void add(
            BuilderProblem.Severity severity, ModelProblem.Version version, String message, Exception exception) {

        source = new StringSource("Hello World!", "LOCATION");
        assertEquals("LOCATION", source.getLocation());
    }

    @Test
    void testGetContent() {
        StringSource source = new StringSource(null);
        assertEquals("", source.getContent());

        source = new StringSource("Hello World!", "LOCATION");
        assertEquals("Hello World!", source.getContent());
    }

        assertInstanceOf(Sources.BuildPathSource.class, source);
        assertEquals(path.normalize(), source.getPath());
    }

    @Test
    void testResolvedSource() {
        String location = "/tmp";
        Path path = Paths.get(location);
        String modelId = "org.example:test:1.0.0";
        ModelSource source = Sources.resolvedSource(path, modelId);

        assertNotNull(source);