def checkBindings(current, expected):
    """
    This method checks that you give the appropriate forced bindings
    to the sepa instance. In an ysap, the required bindings are the
    ones that do not have a default value. Which means the ones that
    have their value == "".
    """
    set_current = set(current.keys())
    set_expected = set(expected.keys())
    set_difference = set_expected - set_current
    if len(set_difference) != 0:
        for key in set_difference:
            if expected[key]['value'] == '':
                raise KeyError(key + ' is a required forcedbinding')
    return True
