public static FidFileManager getInstance() {
		if (THE_FID_FILE_MANAGER == null) {
			THE_FID_FILE_MANAGER = new FidFileManager();
		}
		return THE_FID_FILE_MANAGER;
	}
Returns the singleton instance of the FidFileManager.
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FidFileManager.java