code: def _render(self, painter):
      multi_pen = self._pens is not None
      multi_brush = self._brushes is not None
      no_pen = (
          not multi_pen
          and self._sharedPen.style() == QtCore.Qt.PenStyle.NoPen
      )
  
      rects = self._rectarray.instances()
  
      if no_pen and multi_brush:
          for idx, rect in enumerate(rects):
              painter.fillRect(rect, self._brushes[idx])
      else:
          if not multi_pen:
              painter.setPen(self._sharedPen)
          if not multi_brush:
              painter.setBrush(self._sharedBrush)
  
          for idx, rect in enumerate(rects):
              if multi_pen:
                  painter.setPen(self._pens[idx])
              if multi_brush:
                  painter.setBrush(self._brushes[idx])
  
              painter.drawRect(rect)
  
imports: import numpy
  from ..None import functions
  from ..None import getConfigOption
  from ..None import Qt
  from ..Qt import QtCore, QtGui
  from .GraphicsObject import GraphicsObject
label_desc: Use image node_id 7 for calling the BarGraphItem obj's underlying member method code with example usage: obj._render(painter) without return types