public void setArrowLength(int length) {
		this.arrowLength = length;
	}
Sets the length of the arrow. The width will be proportional to the length.
Note: this option is not exposed in the Options because it is too specific to a graph
instance and wouldn't be appropriate to apply to shared options.
@param length the size of the arrow
Ghidra/Framework/Graph/src/main/java/ghidra/service/graph/GraphDisplayOptions.java