If 'gt_bases' field missing from VariantEvidence data, we can't create VariantAlternate but should not throw error, I think.
If 'gt_bases' field missing from VariantEvidence data, we can't create VariantAlternate but should not throw error, I think.

woodymit/millstone_accidental_source,woodymit/millstone,woodymit/millstone,churchlab/millstone,woodymit/millstone,woodymit/millstone,churchlab/millstone,churchlab/millstone,woodymit/millstone_accidental_source,woodymit/millstone_accidental_source,woodymit/millstone_accidental_source,churchlab/millstone