private void setLongHeaderField(int headerRelativeOffsetBytes,
                                  long headerFieldValue) {
    Objects.checkIndex(headerRelativeOffsetBytes, HeaderLayout.HEADER_SIZE - Long.BYTES + 1);
    INT64_OVER_BYTE_BUFFER.setVolatile(headerPage.rawPageBuffer(), headerRelativeOffsetBytes, headerFieldValue);
  }
private void setLongHeaderField(int headerRelativeOffsetBytes,
                                  long headerFieldValue)