code: def indices_numpy(self) -> np.ndarray:
      # TODO URGENT implement using cython
      return np.array(self.indices_list(), dtype=np.intp)
  
imports: import numpy
  from typing import Any, Iterator, List, Tuple, Union
  from aim.storage.treeview import TreeView
  from aim.storage.arrayview import ArrayView
label_desc: Use image node_id 16 for calling the TreeArrayView obj's underlying member method code with example usage: obj.indices_numpy() and returns: np