Logger
Description:
Creates a new Logger with the given debug level.
 If level is BODY, max_body_size gives the
      maximum number of bytes of the body that will be logged. (-1 means "no limit".)
If you need finer control over what message parts are and aren't logged, use set_request_filter and set_response_filter.
Parameters:
| level | 
           the debug level  | 
      
| max_body_size | 
           the maximum body size to output, or -1  | 
      
Returns:
| 
           a new Logger  |