private FidFile findExistingFidFile(File file) {
		loadFidFiles();
		for (FidFile fidFile : fidFiles) {
			if (fidFile.getFile().equals(file)) {
				return fidFile;
			}
		}
		return null;
	}
Add user FidDb file
@param file
@return FidFile or null if invalid
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FidFileManager.java