def validate_equal(a,b,message='',exception=None):
    if a!=b:
        name,l = scoped_validation()
        ArgCheck(name,exception).validation(False,message,l)
Update current mailbox ChangeNumber for given message database (server).
dataset/ETHPy150Open ooici/pyon/pyon/util/arg_check.py/validate_equal--crossover with--dataset/ETHPy150Open byt3bl33d3r/pth-toolkit/lib/python2.7/site-packages/openchange/mailbox.py/OpenChangeDB.set_message_ChangeNumber