code: def has_variation(variant_call):
      """Returns True if and only if the call has a non-reference genotype.
  
      Args:
        variant_call: VariantCall proto. The VariantCall to evaluate.
  
      Returns:
        True if and only if the call has a non-reference genotype.
      """
      return any(gt > 0 for gt in variant_call.genotype)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from third_party.nucleus.protos import struct_pb2
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import struct_utils
  from third_party.nucleus.util import vcf_constants
label_desc: Use image node_id 19 for calling a global function with example usage: has_variation(variant_call) and returns: any