Extract acronyms from the fulltext.

    :param fulltext: utf-8 string
    :return: dictionary of matches in a formt {
          <keyword object>, [matched skw or ckw object, ....]
          }
          or empty {}

def extract_abbreviations(fulltext):
    """Extract acronyms from the fulltext.

    :param fulltext: utf-8 string
    :return: dictionary of matches in a formt {
          <keyword object>, [matched skw or ckw object, ....]
          }
          or empty {}
    """
    acronyms = {}
    for k, v in get_acronyms(fulltext).items():
        acronyms[KeywordToken(k, type='acronym')] = v
    return acronyms