private AddressSetView getStartSet(ProgramLocationActionContext context) {
		Program program = context.getProgram();
		if (program == null) {
			return new AddressSet();
		}
		if (context.hasSelection()) {
			return context.getSelection();
		}
		return new AddressSet(program.getMemory());
	}
If there is a selection, this returns the selection address set.
Otherwise it returns the program's address set.
@return
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/select/qualified/QualifiedSelectionPlugin.java