private void registerProgramFlowGraphDisplayOptionsWithTool() {
		// We don't need one of this right now, but creating it will make sure it
		// shows up in the tool options
		new ProgramGraphDisplayOptions(new BlockFlowGraphType(), tool);
	}
Plugin for generating program graphs. It uses the GraphServiceBroker to consume/display
the graphs that it generates. This plugin generates several different types of program graphs.
Both the "block flow" and "code flow" actions will generate a graph of basic block flows. The only
difference is that the "code flow" action generates a graph that
displays the assembly for each basic block, whereas the "block flow" action generates a graph
that displays the symbol or address at the start of the basic block.  This plugin also
generates call graphs, using either the default subroutine model or one that the user chooses.
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/ProgramGraphPlugin.java