code: def test_base64():
      res = decrypt(
          Config().library_default().complete_config(),
          "SGVsbG8gbXkgbmFtZSBpcyBiZWUgYW5kIEkgbGlrZSBkb2cgYW5kIGFwcGxlIGFuZCB0cmVl",
      )
  
      assert res == answer_str
  
imports: import pytest
  from ciphey import decrypt
  from ciphey.iface import Config
label_desc: Use image node_id 11 for calling a global function with example usage: test_base64() without return types