code: def test_md5_file_b64_no_files():
      b64hash = base64.b64encode(hashlib.md5(b"").digest()).decode(
          "ascii"
      )
      assert b64hash == hashutil.md5_file_b64()
  
file_path: wandb/tests/pytest_tests/unit_tests/test_lib/test_hashutil.py
imports: import base64
  import hashlib
  from hypothesis import given
  from hypothesis import strategies
  from wandb.sdk.lib import hashutil
label_desc: Use image node_id 6 for calling a global function with example usage: test_md5_file_b64_no_files() without return types