text: #include <stddef.h>
  
  typedef struct {
      void *p;
      size_t size;
  } fatPtr_t;
  
  typedef struct {
      const void *p;
      size_t size;
  } constFatPtr_t;
  
  typedef struct {
      fatPtr_t store;
      size_t used;
  } store_t;
  
  