private static final String SHA1_PROPERTY = "sha1";

    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);
    }