package com.todomvc.shared.command;An object of this class executes commands of a specific type. It loads the target object of a command and passes it to Command's execute(). Type C is the type of command this executor executes.
public interface CommandExecutor<C extends Command<?>> {Executes command and returns either the command that was passed or else a new command suitable to update other clients. An example of returning a new command is when a new object was created: the returned command might contain the new object.
Command<?> execute(C command);
}