code: def is_filtered(variant):
      """Returns True if variant has a non-PASS filter field, or False otherwise."""
      return bool(variant.filter) and any(
          f not in {"PASS", vcf_constants.MISSING_FIELD}
          for f in variant.filter
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import enum
  import itertools
  import six
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import ranges
  from third_party.nucleus.util import variantcall_utils
  from third_party.nucleus.util import vcf_constants
label_desc: Use image node_id 26 for calling a global function with example usage: is_filtered(variant) and returns: unknown