Setups logging for the this.
The logging_level can be one of: "all" - log whole raw communication; "body" - the same as "all"; "headers" - log the
headers only; "min" - minimal logging; "1" - the same as "all". Any other value, including null,
disables logging.
Use get_log_level to get current log level.
| this |
an SoupSession |
| logging_level |
logging level to setup, or null |