private Set<FidFile> loadFidFiles() {
		if (fidFiles == null) {
			findDeliveredFidFiles();
			restoreFromPreferences();
		}

		return fidFiles;
	}
Returns the singleton instance of the FidFileManager.
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FidFileManager.java