@Override
	public synchronized void createFolder(String parentPath, String folderName)
			throws InvalidNameException, IOException {

		if (readOnly) {
			throw new ReadOnlyException();
		}

		testValidName(parentPath, true);
		testValidName(folderName, false);

		String path = getPath(parentPath, folderName);
		File dir = getFile(path);
		if (dir.exists()) {
			return; // ignore request if already exists
		}
		createFolders(dir, path);

	}
Deallocate item storage
@param folderPath
@param itemName
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/MangledLocalFileSystem.java