#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>

struct Opaque;

struct Option_____Opaque;

struct Foo {
  const struct Opaque *x;
  struct Opaque *y;
  void (*z)(void);
  void (**zz)(void);
};

union Bar {
  const struct Opaque *x;
  struct Opaque *y;
  void (*z)(void);
  void (**zz)(void);
};

void root(const struct Opaque *a,
          struct Opaque *b,
          struct Foo c,
          union Bar d,
          struct Option_____Opaque *e,
          void (*f)(const struct Opaque*));