// The inputs the C documentation samples leave to the reader. `just rs c-tests`
// compiles every C sample in doc/lib/c beside this header, so a sample that
// names a missing symbol or passes the wrong arguments fails. Never executed.
static const char *hex_sha256;
static const char *url;
static size_t url_len;
static uint32_t origin;
static void *user_data;
static void
static int