pub unsafe extern "C" fn rocksdb_get_into_buffer(
db: *mut rocksdb_t,
options: *const rocksdb_readoptions_t,
key: *const c_char,
keylen: usize,
buffer: *mut c_char,
buffer_size: usize,
vallen: *mut usize,
found: *mut c_uchar,
errptr: *mut *mut c_char,
) -> c_uchar