Async_log_kernel.LevelSourceDescribes both the level of a log and the level of a message sent to a log. There is an ordering to levels (`Debug < `Info < `Error), and a log set to a level will never display messages at a lower log level.
Messages without a level are treated as `Info.
include Core.Bin_prot.Binable.S with type t := tinclude Bin_prot.Binable.S_only_functions with type t := tThis function only needs implementation if t exposed to be a polymorphic variant. Despite what the type reads, this does *not* produce a function after reading; instead it takes the constructor tag (int) before reading and reads the rest of the variant t afterwards.
include Ppx_enumerate_lib.Enumerable.S with type t := t