def citem2higher(citem):
    """This gets the higher representation of a given :class:``citem``, \
    that is, a :class:``cinsn_t`` or :class:``cexpr_t``

    :param citem: a :class:``citem`` object
    :type citem: :class:``citem``
    """

    if citem.is_expr():
        return citem.cexpr

    return citem.cinsn