Your assumptions are correct but the 2nd panel is dependent on the 1st panel. when i click the file in 1st panel, the 2nd one gets display by drilldown. The view you are seeing in 2nd panel is of unique events of one file in different versions. Now from this , there are numerous files with such differences. Some have unique events, some don't . How can i display the name of files who have different events in the versions? For simplicity , instead of taking 4 versions of a file(as in my dashboard which a shared the pic) , lets assume there are only two versions.
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