setup_from_out_channel oc will configure the logger to print all logging statement to oc.

Function can be called multiple times, each call will disable (override) the previously setup out channel

log format x y same as Printf.printf except that the message will get printed to the previously setup out_channel in the setup_from_out_channel function.

endline str same as Stdlib.print_endline str except that the message will get printed to the previously setup out_channel in the setup_from_out_channel function.