code: def _fraction_histogram(values, number_of_bins=10):
      counts, bins = np.histogram(
          values, bins=number_of_bins, range=(0, 1)
      )
      return _format_histogram_for_vega(counts, bins)
  
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 7 for calling a global function with example usage: _fraction_histogram(values, number_of_bins) and returns: _format_histogram_for_vega