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