class_docstr: This is a mixin class to support scalar data to RGBA mapping.
  The ScalarMappable makes use of data normalization before returning
  RGBA colors from the given colormap.
docstr: Call this whenever the mappable is changed to notify all the
  callbackSM listeners to the 'changed' signal
docstr_tok: ["Call","this","whenever","the","mappable","is","changed","to","notify","all","the","callbackSM","listeners","to","the","'changed","'","signal"]
code: def changed(self):
      """
      Call this whenever the mappable is changed to notify all the
      callbackSM listeners to the 'changed' signal
      """
      self.callbacksSM.process("changed", self)
  
      for key in self.update_dict:
          self.update_dict[key] = True
      self.stale = True
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import numpy
  from numpy import ma
  import matplotlib
  import matplotlib.colors
  import matplotlib.cbook
  from matplotlib._cm import datad
  from matplotlib._cm_listed import cmaps
label_desc: Use image node_id 14 for calling the ScalarMappable obj's underlying member method code with example usage: obj.changed() without return types