code: def copy(self):
      return self._with_data(self.data.copy(), copy=True)
  
imports: import cupy
  import numpy
  from cupy._core import internal
  from cupy import _util
  from cupyx.scipy.sparse import _base
  from cupyx.scipy.sparse import _coo
  from cupyx.scipy.sparse import _sputils
label_desc: Use image node_id 8 for calling the _data_matrix obj's underlying member method code with example usage: obj.copy() and returns: self