[ISSUE] Decorator is not returning value from decorated function.

[lkellermann]

Steps to reproduce:

• Create a function that needs to return a value and decorate it.
• Call the value of the function.

This can happen in Python 3.10.

Case study: a function which returns a dictionary from a string

2022-11-01 12:40:08,549 - Working directory:     /app/...
2022-11-01 12:40:08,549 - Module name:           nodes.facebook
2022-11-01 12:40:08,550 - Method name:           run_cli
2022-11-01 12:40:08,550 - Error message:         None
2022-11-01 12:40:08,551 - Start time:            2022-11-01 12:40:07.956726
2022-11-01 12:40:08,551 - End time:              2022-11-01 12:40:08.547358
2022-11-01 12:40:08,551 - Elapsed time:          0:00:00.590632
2022-11-01 12:40:08,556 - Variables:             (command)
2022-11-01 12:40:08,557 - Args:                  None
2022-11-01 12:40:08,557 - Kwargs:                None
2022-11-01 12:40:08,557 - Log path:              /app/.../run_cli_01Nov2022_124008.log
None # Should be a json string.
Traceback (most recent call last):
  File "/app/.../src/main.py", line 13, in <module>
    main()
  File "/app/.../src/main.py", line 9, in main
    FacebookNode.run_node()
  File "/app/.../src/nodes/facebook.py", line 95, in run_node
    dataframes.append(json_string_to_dataframe(data_string))
  File "/app/.../src/nodes/facebook.py", line 68, in json_string_to_dataframe
    data = json.loads(data_string)['data'][0]
  File "/usr/local/lib/python3.10/json/__init__.py", line 339, in loads
    raise TypeError(f'the JSON object must be str, bytes or bytearray, '
TypeError: the JSON object must be str, bytes or bytearray, not NoneType