private static void createRootDir(String rootPath) throws IOException {
		File dir = new File(rootPath);
		if (!dir.isDirectory() && !dir.mkdirs()) {
			throw new IOException("Failed to create root directory: " + dir);
		}
	}
Create empty mangled filesystem
@param rootPath path for root directory (must already exist).
@param isVersioned if true item versioning will be enabled.
@param readOnly if true modifications within this file-system will not be allowed
and result in an ReadOnlyException
@param enableAsyncronousDispatching if true a separate dispatch thread will be used
to notify listeners.  If false, blocking notification will be performed.
@throws IOException
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/store/local/LocalFilesystemTestUtils.java