@Override
	public int cursorBeginning(FieldLocation cursorLoc) {

		Field field = fields[0];

		cursorLoc.row = field.getRow(lastCursorY);
		cursorLoc.col = field.getCol(cursorLoc.row, field.getStartX());
		cursorLoc.fieldNum = 0;
		return field.getX(cursorLoc.row, cursorLoc.col);
	}
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