class_docstr: Abstract class for CtrlNodes that can connect to plots.
class_docstr_tok: ["Abstract","class","for","CtrlNodes","that","can","connect","to","plots","."]
docstr: Define what happens when the node is disconnected from a plot
docstr_tok: ["Define","what","happens","when","the","node","is","disconnected","from","a","plot"]
code: def disconnectFromPlot(self, plot):
      """Define what happens when the node is disconnected from a plot"""
      raise Exception("Must be re-implemented in subclass")
  
imports: import numpy
  from ...Qt import QtCore, QtWidgets
  from ...WidgetGroup import WidgetGroup
  from ...widgets.ColorButton import ColorButton
  from ...widgets.SpinBox import SpinBox
  from ..Node import Node
label_desc: Use image node_id 5 for calling the PlottingCtrlNode obj's underlying member method code with example usage: obj.disconnectFromPlot(plot) without return types