+ typedef void (*Usage) (void);
+ Usage usage;
+
+ typedef int (*Function) (int argc, char *argv[]);
+ Function function;
+};
+
+extern const Command diff_command;
+extern const Command diff_state_command;
+extern const Command diff_images_command;
+extern const Command dump_command;
+extern const Command dump_images_command;
+extern const Command pickle_command;
+extern const Command repack_command;
+extern const Command retrace_command;
+extern const Command trace_command;
+extern const Command trim_command;