public Set<FGVertex> getSelectedVertices() {
		return selectedVertices;
	}
A container object use by the graph's context system to give actions the state of the graph.

<P>This class has a vertex which is considered the active vertex, which may be the vertex
under the mouse (for mouse driven data)  or the focused vertex (for key event driven data).
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/action/VertexActionContextInfo.java