class_docstr: Concatenates record arrays and/or adds new columns
class_docstr_tok: ["Concatenates","record","arrays","and\/or","adds","new","columns"]
code: def remInput(self):
      sel = self.tree.currentItem()
      term = sel.term
      term.joinItem = None
      sel.term = None
      self.tree.removeTopLevelItem(sel)
      self.removeTerminal(term)
      self.update()
  
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 4 for calling the ColumnJoinNode obj's underlying member method code with example usage: obj.remInput() without return types