void showTooltip(int row) {
    Point topLeftCorner = new Point(myTable.getColumnDataRectLeft(myTable.getColumnViewIndex(Commit.INSTANCE)),
                                    row * myTable.getRowHeight());
    Point pointInCell = new Point(getTooltipXCoordinate(row), myTable.getRowHeight() / 2);
    showTooltip(row, pointInCell, new Point(topLeftCorner.x + pointInCell.x, topLeftCorner.y + pointInCell.y), true);
  }
void showTooltip(int row)