public void shift(int rowShift, int colShift) {
		if (rowShift == 0 && colShift == 0) {
			return;
		}

		for (GridPoint p : allPoints()) {
			p.row += rowShift;
			p.col += colShift;
		}
		rootColumn += colShift;
		gridBounds.shift(rowShift, colShift);

	}
Shifts the rows and columns for all points in this map by the given amount.
@param rowShift the amount to shift the rows of each point
@param colShift the amount to shift the columns of each point
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/layout/GridLocationMap.java