public int getEndCol() {
		return points.get(pointIndex + 1).col;
	}
Return the index of the column where this row segment ends. Note that this is different
from the right column. The end column is in the order of the articulation points whereas 
the right column is always the right most spatially column (higher 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