--- /dev/null
+
+#include <time.h>
+
+#include "foo.upb.h"
+
+int main() {
+ upb_arena *arena = upb_arena_new();
+ Foo* foo = Foo_new(arena);
+ const char greeting[] = "Hello, World!\n";
+
+ Foo_set_time(foo, time(NULL));
+ /* Warning: the proto will not copy this, the string data must outlive
+ * the proto. */
+ Foo_set_greeting(foo, upb_strview_makez(greeting));
+
+ upb_arena_free(arena);
+}