hunk.code_window:         states={'draft': [('readonly', False)]},
           help="If its checked, indicates that all payslips generated from here are refund payslips.")
       payslip_count = fields.Integer(compute='_compute_payslip_count')
       def _compute_payslip_count(self):
           for payslip_run in self:
               payslip_run.payslip_count = len(self.slip_ids)
  
hunk.labels: keep keep add keep keep keep keep
hunk.after_edit:     company_id = fields.Many2one('res.company', string='Company', readonly=True, required=True,
           default=lambda self: self.env['res.company']._company_default_get())
  
hunk.file_path: addons/hr_payroll/models/hr_payslip.py
hunk.type: add
file: // Credit: Nicolas Gallagher and SUIT CSS.
  
  .embed-responsive {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
    overflow: hidden;
  
    &::before {
      display: block;
      content: "";
    }
  
    .embed-responsive-item,
    iframe,
    embed,
    object,
    video {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 0;
    }
  }
  
  @each $embed-responsive-aspect-ratio in $embed-responsive-aspect-ratios {
    $embed-responsive-aspect-ratio-x: nth($embed-responsive-aspect-ratio, 1);
    $embed-responsive-aspect-ratio-y: nth($embed-responsive-aspect-ratio, 2);
  
    .embed-responsive-#{$embed-responsive-aspect-ratio-x}by#{$embed-responsive-aspect-ratio-y} {
      &::before {
        padding-top: percentage($embed-responsive-aspect-ratio-y / $embed-responsive-aspect-ratio-x);
      }
    }
  }
  