Parameters consistency checking for a bdmroot offspring

[mido]

At the moment, the validity and compatibility of actual values of an instance parameters can be (sometimes) checked by class-specific "set_parameters" methods. Obviously, it will be helpful to find a general way for this operation. For instance, it will be useful in the UserInfo? framework - soon after the new instance is created.

At the same moment, the default values maintenance should be thinked over. Is it really best to store them as static constants included in the relevant class?! Anyway, it is still necessary to change source codes appropriately.