%>>%                    The lumberjack operator
cellwise                The cellwise logger.
dump_log                Dump a log
expression_logger       The expression logger.
filedump                The file dumping logger.
get_log                 Get log object from a data item
lumberjack              The pipe operator that logs
simple                  The simple logger.
start_log               Start logging changes on a dataset.
stop_log                Stop logging
