code: def search_variant_annotations(
              self, variant_annotation_set_id, reference_name="",
              reference_id="", start=0, end=0, effects=[]):
          
          request = protocol.SearchVariantAnnotationsRequest()
          request.variant_annotation_set_id = variant_annotation_set_id
          request.reference_name = reference_name
          request.reference_id = reference_id
          request.start = start
          request.end = end
          for effect in effects:
              request.effects.add().CopyFrom(protocol.OntologyTerm(**effect))
          for effect in request.effects:
              if not effect.term_id:
                  raise exceptions.ErrantRequestException(
                      "Each ontology term should have an id set")
          request.page_size = pb.int(self._page_size)
          return self._run_search_request(
              request, "variantannotations",
              protocol.SearchVariantAnnotationsResponse)
docs: Returns an iterator over the Variant Annotations fulfilling
          the specified conditions from the specified VariantSet.
  
          :param str variant_annotation_set_id: The ID of the
              :class:`ga4gh.protocol.VariantAnnotationSet` of interest.
          :param int start: Required. The beginning of the window (0-based,
              inclusive) for which overlapping variants should be returned.
              Genomic positions are non-negative integers less than reference
              length. Requests spanning the join of circular genomes are
              represented as two requests one on each side of the join
              (position 0).
          :param int end: Required. The end of the window (0-based, exclusive)
              for which overlapping variants should be returned.
          :param str reference_name: The name of the
              :class:`ga4gh.protocol.Reference` we wish to return variants from.
  
          :return: An iterator over the
              :class:`ga4gh.protocol.VariantAnnotation` objects
              defined by the query parameters.
          :rtype: iter