private void setEdgeColor(AttributedEdge edge, AttributedVertex fromVertex,
			AttributedVertex toVertex) {
		// color the edge: first on the 'from' vertex, then try to 'to' vertex
		String fromColor = fromVertex.getAttribute("Color");
		String toColor = toVertex.getAttribute("Color");
		if (fromColor != null || toColor != null) {
			if (fromColor != null) {
				edge.setAttribute("Color", fromColor);
			}
			else if (toColor != null) {
				edge.setAttribute("Color", toColor);
			}
		}

	}
Set the maximum number of code lines which will be used per block when
showCode is enabled.
@param maxLines maximum number of code lines
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/BlockGraphTask.java