@Override
	public boolean cursorDown(FieldLocation cursorLoc, int lastX) {
		if (cursorLoc.row < fields[cursorLoc.fieldNum].getNumRows() - 1) {
			cursorLoc.row++;
			cursorLoc.col = fields[cursorLoc.fieldNum].getCol(cursorLoc.row, lastX);
			return true;
		}
		return false;
	}
Returns the row number of this layout with respect to its containing layout.
@return the row number of this layout with respect to its containing layout.
Ghidra/Framework/Docking/src/main/java/docking/widgets/fieldpanel/support/RowLayout.java