class_docstr: Select named columns from a record array or MetaArray.
class_docstr_tok: ["Select","named","columns","from","a","record","array","or","MetaArray","."]
code: def restoreState(self, state):
      Node.restoreState(self, state)
      self.columns = set(state.get("columns", []))
      for c in self.columns:
          self.addOutput(c)
  
imports: import numpy
  from ...graphicsItems.LinearRegionItem import LinearRegionItem
  from ...Qt import QtCore, QtWidgets
  from ...widgets.TreeWidget import TreeWidget
  from ..Node import Node
  from .None import functions
  from .common import CtrlNode
label_desc: Use image node_id 7 for calling the ColumnSelectNode obj's underlying member method code with example usage: obj.restoreState(state) without return types