docstr: Sets the stroke width (in px) of the subunits boundaries.
  
  The 'subunitwidth' property is a number and may be specified as:
    - An int or float in the interval [0, inf]
  
  Returns
  -------
  int|float
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code: def subunitwidth(self):
      """
      Sets the stroke width (in px) of the subunits boundaries.
  
      The 'subunitwidth' property is a number and may be specified as:
        - An int or float in the interval [0, inf]
  
      Returns
      -------
      int|float
      """
      return self["subunitwidth"]
  
imports: from plotly.basedatatypes import BaseLayoutHierarchyType
  import copy
label_desc: Use image node_id 59 for calling the Geo obj's underlying member method code with example usage: obj.subunitwidth() and returns: self