public int getStartRow() {
		return points.get(pointIndex).row;
	}
Return the index of the row where this column segment starts. Note that this is different
from the top row. The start row is in the order of the articulation points whereas the top
row is always the spatially upper (lower row index) row of either the start row or end row.
@return the index of the grid row for the start point of this segment
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/layout/flowchart/ColumnSegment.java