code: def _generate_overview_note(pass_count, only_warning_count, error_count, total_count):
      
  
      note_html = ['<div class="progress">']
      pbars = [
          [ float(error_count), 'danger', 'had errors' ],
          [ float(only_warning_count), 'warning', 'had warnings' ],
          [ float(pass_count), 'success', 'passed' ]
      ]
      for b in pbars:
          if b[0]:
              note_html.append(
                  '<div class="progress-bar progress-bar-{pbcol}" style="width: {pct}%" data-toggle="tooltip" title="{count} {sample} {txt}">{count}</div>'. \
                  format(
                      pbcol = b[1],
                      count = int(b[0]),
                      pct = (b[0]/float(total_count))*100.0,
                      txt = b[2],
                      sample = 'samples' if b[0] > 1 else 'sample'
                  )
              )
      note_html.append('</div>')
  
      return "\n".join(note_html)
docs: Generates and returns the HTML note that provides a summary of validation status.