def form_presentation(elastic_apartment):
    """
    Fetch link to apartment presentation and add it to the end of project description
    """
    main_text = getattr(elastic_apartment, "project_description", None)
    link = getattr(elastic_apartment, "url", None)

    if main_text or link:
        return "\n".join(filter(None, [main_text, link]))
    return None