code: def conj(self, copy=True):
      if cupy.issubdtype(self.dtype, cupy.complexfloating):
          return self._with_data(self.data.conj(), copy=copy)
      elif copy:
          return self.copy()
      else:
          return self
  
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 7 for calling the _data_matrix obj's underlying member method code with example usage: obj.conj(copy) and returns: self, self, self