docs: def annotate_snv(adpter, variant):
      """Annotate an SNV/INDEL variant
      
      Args:
          adapter(loqusdb.plugin.adapter)
          variant(cyvcf2.Variant)
      """
      variant_id = get_variant_id(variant)
      variant_obj = adapter.get_variant(variant={'_id':variant_id})
      
      annotated_variant = annotated_variant(variant, variant_obj)
      return annotated_variant