code: def _csc_to_dense_coordinates(self):
      # CSC sparse array
      all_coordinates = []
      total_rows = self._dense_shape[1]
      all_cols = self._row_indices.to_list()
      all_rows = self._ccol_indices.to_list()
      for col in range(total_rows):
          rows = all_cols[all_rows[col] : all_rows[col + 1]]
          for row in rows:
              all_coordinates.append([row, col])
      return all_coordinates
  
imports: import ivy
  from ivy.func_wrapper import inputs_to_native_arrays
  from ivy.utils.exceptions import handle_exceptions
label_desc: Use image node_id 28 for calling the SparseArray obj's underlying member method code with example usage: obj._csc_to_dense_coordinates() and returns: all_coordinates