code: def test_to_dlpack(*, dtype_and_x, backend_fw):
      ivy.set_backend(backend_fw)
      input_dtype, x = dtype_and_x
      native_array = ivy.native_array(x[0])
      cap = ivy.to_dlpack(native_array)
      assert is_capsule(cap)
  
imports: from hypothesis import strategies, assume
  import numpy
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test, BackendHandler
  import ivy_tests.test_ivy.helpers.globals
  from ivy_tests.test_ivy.test_functional.test_core.test_dtype import astype_helper
label_desc: Use image node_id 25 for calling a global function with example usage: test_to_dlpack() without return types