code: def strand_barplot(self):
          
          # Plot bar graph of groups
          keys = [ 'End 1 Sense', 'End 1 Antisense', 'End 2 Sense', 'End 2 Antisense' ]
          # Config for the plot
          pconfig = {
              'id': 'rna_seqc_strandedness_plot',
              'title': 'RNA-SeQC: Strand Specificity',
              'ylab': '% Reads',
              'cpswitch_counts_label': '# Reads',
              'cpswitch_percent_label': '% Reads',
              'ymin': 0,
              'cpswitch_c_active': False
          }
          self.add_section (
              name = 'Strand Specificity',
              anchor = 'rna_seqc_strand_specificity',
              helptext = 'End 1/2 Sense are the number of End 1 or 2 reads that were sequenced in the sense direction. '
                         'Similarly, End 1/2 Antisense are the number of End 1 or 2 reads that were sequenced in the '
                         'antisense direction',
              plot = bargraph.plot(self.rna_seqc_metrics, keys, pconfig)
          )
docs: Plot a bargraph showing the strandedness of alignments