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Possible to add a column to Sample Set data table?
I'm running a method that uses Sample Set as the root entity. For this method, I'm using a file that is different depending on the sample set that's being run. I'd like to be able to specify something like "this.extra_file" instead of "gs://bucket/sample_set1_extra_file.txt", and have to change it each time I change the sample set I'm running. I tried to add this to the metadata file to populate the Sample Set data table, but it complains "Error: Invalid membership TSV. Must have exactly two columns". Is it possible to accomplish this in some way?