public String getDisplayString() {
		return "<html><table><tr><td>start</td><td>" + HTMLUtilities.escapeHTML(start.toString()) +
			"</td><tr><td>end</td><td>" + HTMLUtilities.escapeHTML(end.toString()) +
			"</td><tr><td>ref type</td><td>" + refType + "</td></tr></table>";
	}
Call when the screen moves so that the shape can be updated
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/flowarrow/FlowArrow.java