ditsing/ruaft @ f96c82b53958a715192e049f2ef82d0aef8d6522

Jing Yang 2cf4d68306 Use generic types to allow different types of Command.		%!s(int64=5) %!d(string=hai) anos
..
persister	fa74454870 Implement persister.	%!s(int64=5) %!d(string=hai) anos
mod.rs	2cf4d68306 Use generic types to allow different types of Command.	%!s(int64=5) %!d(string=hai) anos