code: static void store64(byte[] sink, int offset, long value) {
      // We don't want to assert in production code.
      assert offset >= 0 && offset + 8 <= sink.length;
      // Delegates to the fast (unsafe)version or the fallback.
      byteArray.putLongLittleEndian(sink, offset, value);
    }
docs: Store 8 bytes into the provided array at the indicated offset, using the value provided.
  
  @param sink the output byte array
  @param offset the offset into the array at which to start writing
  @param value the value to write