docstr: Sets the source reference on Chart Studio Cloud for  color .
  
  The 'colorsrc' property must be specified as a string or
  as a plotly.grid_objs.Column object
  
  Returns
  -------
  str
code: def colorsrc(self):
      """
      Sets the source reference on Chart Studio Cloud for  color .
  
      The 'colorsrc' property must be specified as a string or
      as a plotly.grid_objs.Column object
  
      Returns
      -------
      str
      """
      return self["colorsrc"]
  
file_path: catboost/contrib/python/plotly/py2/plotly/graph_objs/histogram2dcontour/_marker.py
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 3 for calling the Marker obj's underlying member method code with example usage: obj.colorsrc() and returns: self