code: def _compute_gq_histogram(single_var_stats):
      """Compute a histogram over genotype quality (GQ sub-column under FORMAT in VCF).
  
      Args:
        single_var_stats: list of VariantStats objects.
  
      Returns:
        histogram of genotype quality scores.
      """
      quals = [
          v.genotype_quality
          for v in single_var_stats
          if not isinstance(v.genotype_quality, list)
      ]
      return _get_integer_counts(quals)
  
imports: import collections
  import itertools
  import math
  import numpy
  from third_party.nucleus.util import variant_utils
  from third_party.nucleus.util import variantcall_utils
  from deepvariant import vcf_stats_vis
label_desc: Use image node_id 14 for calling a global function with example usage: _compute_gq_histogram(single_var_stats) and returns: _get_integer_counts