So I have the current code 
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which goes through the list and the one that I need filtered out "SELF-PAY" is not visible. However this list is subject to change so number of classes will go up or down depending on data. I tried: 

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But because its an OLAP based it seems the method doesn't work. Does anybody have an idea how i can filter out SELF-PAY without necessarily having to go through the list?