Data clamp needs to check if both sequence types are same

[walterxie]

Data clamp needs to check if both sequence types are same, such as both should be SequenceType.NUCLEOTIDE or ... :

GraphicalModel

default boolean isClamped(String id) {
        return (id != null && getDataDictionary().containsKey(id) &&
                getModelDictionary().containsKey(id) &&
                getModelDictionary().get(id) instanceof RandomVariable);
}

[walterxie]

Cannot add the validation in core, because the SequenceType is in the base.