class StringDiff {
    private final String baseVersion;
    private final String targetVersion;


    public StringDiff(String baseVersion, String targetVersion) {
        this.baseVersion = baseVersion;
        this.targetVersion = targetVersion;
    }


    public String getReferenceVersion() {
        return baseVersion;
    }

    public String getTargetVersion() {
        return targetVersion;
    }

    public boolean areEqual() {<FILL_FUNCTION_BODY>}
}

        if (baseVersion == null) {
            return targetVersion == null;
        }
        return baseVersion.equals(targetVersion);
    
<no_super_class>