public int hashCode() {
    int result;
    result = myCategory.hashCode();
    result = 29 * result + myMessage.hashCode();
    result = 29 * result + (myFile != null ? myFile.hashCode() : 0);
    result = 29 * result + myRow;
    result = 29 * result + myColumn;
    return result;
  }
public int hashCode()