*/
public interface ModelVersionProcessor {

    /**
     * @param property the property to check
     * @return <code>true</code> if this is a valid property for this processor
     */
    boolean isValidProperty(String property);

    /**
     * This method is responsible for examining the request and possibly overwrite of the valid properties in the model
     *
     * @param modelProperties
     * @param request
     */

    private static final String CHANGELIST_PROPERTY = "changelist";

    private static final String REVISION_PROPERTY = "revision";

    @Override
    public boolean isValidProperty(String property) {
        return REVISION_PROPERTY.equals(property)
                || CHANGELIST_PROPERTY.equals(property)
                || SHA1_PROPERTY.equals(property);
    }

    @Override

        }

        Matcher m = EXPRESSION_NAME_PATTERN.matcher(string.trim());
        while (m.find()) {
            String property = m.group(1);
            if (!versionProcessor.isValidProperty(property)) {
                addViolation(
                        problems,
                        severity,
                        version,
                        fieldName,