Generic logger API. 
      Syntax
         
         
            - 
            (
            void
            ) 
            
               logMessage
            
            : 
            (
            NSString *
            ) 
            message_in 
            
               withLevel
            
            : 
            (
            LoggingLevels
            ) 
            level_in 
            
               andInfo
            
            : 
            (
            NSString *
            ) 
            info_in
         
      
      Parameters
         
         
            - 
               message_in – 
               the message to be logged
            
 
            - 
               info_in – 
               additional info to be logged (i.e. FILE, PRETTY_FUNCTION, LINE)