code: def _fn(x=None, dtype=None):
      if ivy.exists(dtype):
          return dtype
      return x
  
file_path: ivy/ivy_tests/test_ivy/test_frontends/test_tensorflow/test_func_wrapper.py
imports: from hypothesis import given, strategies
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import BackendHandler
  from ivy.functional.frontends.tensorflow.func_wrapper import outputs_to_frontend_arrays, to_ivy_arrays_and_back, handle_tf_dtype
  from ivy.functional.frontends.tensorflow.tensor import EagerTensor
  import ivy.functional.frontends.tensorflow
  import ivy.functional.frontends.numpy
label_desc: Use image node_id 2 for calling a global function with example usage: _fn(x, dtype) and returns: x, dtype