text: from qtpy.QtWidgets import QCheckBox
  
  
  class TSPCheckBox(QCheckBox):
      """CheckBox widget class derived from qtpy.QtWidgets.QCheckBox
  
      Adds the attribute layer and the event connectable method rename to the original class.
      """
      def __init__(self, layer):
          """Instance initialisation.
  
          :param layer: Connected napari viewer layer
          :type layer: napari.layers.Image
          """
          super().__init__()
          self.layer = layer
          self.setText(layer.name)
  
      def rename(self, event):
          """Rename check box upon layer name change.
  
          Sets the instance attribute `text` to self.layer.name. Should be connected to the layers `name` event.
          """
          self.setText(self.layer.name)
  