text: #include "external.h"
  
  int external_int = 6;
  
  Native external_nvar = {3, 4};
  
  void MY_Some_external(void) {
    external_int = 7;
  }
  
  NativeRef external_get_ref(int i, char* s, int* a) {
    s[0] = 'a';
    a[0] = i;
    return &external_nvar;
  }
  
  int external_set_ref(NativeRef n) {
    return n->x + n->y;
  }
  
  Native external_get_var(void) {
    return external_nvar;
  }
  
  int external_set_var(Native n) {
    return n.x + n.y;
  }
  