code: def _deduped_data(self):
      if hasattr(self, "sum_duplicates"):
          self.sum_duplicates()
      return self.data
  
imports: from __future__ import division, print_function, absolute_import
  import numpy
  from .base import spmatrix, _ufuncs_with_fixed_point_at_zero
  from .sputils import isscalarlike, validateaxis, matrix
label_desc: Use image node_id 4 for calling the _data_matrix obj's underlying member method code with example usage: obj._deduped_data() and returns: self