docstr: Groups of nodes. Each group is defined by an array with the
  indices of the nodes it contains. Multiple groups can be
  specified.
  
  The 'groups' property is an info array that may be specified as:
  * a 2D list where:
    The 'groups[i][j]' property is a number and may be specified as:
    - An int or float
  
  Returns
  -------
  list
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code: def groups(self):
      """
      Groups of nodes. Each group is defined by an array with the
      indices of the nodes it contains. Multiple groups can be
      specified.
  
      The 'groups' property is an info array that may be specified as:
      * a 2D list where:
        The 'groups[i][j]' property is a number and may be specified as:
        - An int or float
  
      Returns
      -------
      list
      """
      return self["groups"]
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 9 for calling the Node obj's underlying member method code with example usage: obj.groups() and returns: self