class_docstr: Abstract class for CtrlNodes that can connect to plots.
class_docstr_tok: ["Abstract","class","for","CtrlNodes","that","can","connect","to","plots","."]
code: def process(self, In, display=True):
      out = CtrlNode.process(self, In, display)
      out["plot"] = None
      return out
  
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 6 for calling the PlottingCtrlNode obj's underlying member method code with example usage: obj.process(In, display) and returns: out