GhidraFileData getFileData(String fileName, boolean lazy) throws IOException {
		synchronized (fileSystem) {
			if (lazy || containsFile(fileName)) {
				GhidraFileData fileData = fileDataCache.get(fileName);
				if (fileData == null) {
					fileData = addFileData(fileName);
				}
				return fileData;
			}
		}
		return null;
	}
Get file data for child specified by fileName
@param fileName name of file
@param lazy if true file will not be searched for if not already discovered - in
this case null will be returned
@return file data or null if not found or lazy=true and not yet discovered
@throws IOException if an IO error occurs while checking for file existance
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/GhidraFolderData.java