typedef struct s4u_Storage s4u_Storage;
typedef struct s4u_NetZone s4u_NetZone;
typedef struct s4u_VM s4u_VM;
typedef struct kernel_Activity* smx_activity_t;
typedef struct s4u_Storage s4u_Storage;
typedef struct s4u_NetZone s4u_NetZone;
typedef struct s4u_VM s4u_VM;
typedef struct kernel_Activity* smx_activity_t;