pub unsafe extern "C" fn db_env_set_func_file_map(
arg1: Option<unsafe extern "C" fn(arg1: *mut DB_ENV, arg2: *mut c_char, arg3: usize, arg4: c_int, arg5: *mut *mut c_void) -> c_int>,
arg2: Option<unsafe extern "C" fn(arg1: *mut DB_ENV, arg2: *mut c_void) -> c_int>,
) -> c_int