code: def hicpro_pairing_chart (self):
          
  
          # Specify the order of the different possible categories
          keys = OrderedDict()
          keys['Unique_paired_alignments'] = { 'color': '#005ce6', 'name': 'Uniquely Aligned' }
          keys['Low_qual_pairs'] = { 'color': '#b97b35', 'name': 'Low Quality' }
          keys['Pairs_with_singleton'] = { 'color': '#ff9933', 'name': 'Singleton' }
          keys['Multiple_pairs_alignments'] = { 'color': '#e67300', 'name': 'Multi Aligned' }
          keys['Unmapped_airs'] = { 'color': '#a9a2a2', 'name': 'Failed To Align' }
      
          # Config for the plot
          config = {
              'id': 'hicpro_pairing_stats_plot',
              'title': 'HiC-Pro: Pairing Statistics',
              'ylab': '# Reads',
              'cpswitch_counts_label': 'Number of Reads'
          }
  
          return bargraph.plot(self.hicpro_data, keys, config)
docs: Generate Pairing chart