private void addCopySigFeatureGraph(int blockIndex, AttributedGraph graph) {
		//at the moment just graph one block
		//future improvement: search block for standalone copies and graph each one
		AttributedVertex baseBlockVertex =
			graph.addVertex(BSimFeatureGraphType.COPY_PREFIX + Integer.toString(blockIndex));
		HighFunction hfunction = provider.getModel().getHighFunction();
		PcodeBlockBasic basicBlock = hfunction.getBasicBlocks().get(blockIndex);
		setVertexTypeAndAttributes(baseBlockVertex, basicBlock,
			BSimFeatureGraphType.COPY_SIGNATURE);

	}
Returns the {@link AttributedGraph} created by (the last firing of) this action.
@return graph
Ghidra/Features/BSimFeatureVisualizer/src/main/java/ghidra/bsfv/HighlightAndGraphAction.java