code: def _fn1(
      a: Union[ivy.Array, ivy.NativeArray],
      b: str = "hello",
      c: Optional[int] = None,
      d: ivy.NativeArray = None,
  ):
      return a, b, c, d
  
imports: import pytest
  from typing import List, Tuple, Dict, Optional, Union
  import ivy
label_desc: Use image node_id 2 for calling a global function with example usage: _fn1(a, b, c, d) and returns: a,  b,  c,  d