Function parity_rocksdb_sys::ffi::rocksdb_merge

pub unsafe extern "C" fn rocksdb_merge(
    db: DBInstance, 
    writeopts: DBWriteOptions, 
    k: *const u8, 
    kLen: size_t, 
    v: *const u8, 
    vLen: size_t, 
    err: *mut *const i8
)