code: def triu_indices(
      n_rows: int,
      n_cols: Optional[int] = None,
      k: int = 0,
      /,
      *,
      device: str,
  ) -> Tuple[Union[(None, mx.ndarray.NDArray)]]:
      raise IvyNotImplementedException()
  
imports: import mxnet
  import numpy
  from numbers import Number
  from typing import Union, List, Optional, Sequence, Tuple
  import ivy
  from ivy.utils.exceptions import IvyNotImplementedException
  from ivy.functional.ivy.creation import _asarray_to_native_arrays_and_back, _asarray_infer_device, _asarray_handle_nestable, NestedSequence, SupportsBufferProtocol, _asarray_inputs_to_native_shapes
label_desc: Use image node_id 21 for calling a global function with example usage: triu_indices() without return types