public synchronized void add(GFileSystem fs) {
		FSCacheInfo fsci = new FSCacheInfo(fs);
		fs.getRefManager().addListener(this);
		if (filesystems.put(fs.getFSRL(), fsci) != null) {
			Msg.warn(this, "Added second instance of same filesystem!  " + fs.getFSRL());
		}
	}
Adds a new {@link GFileSystem} to the cache.

@param fs {@link GFileSystem} to add to this cache.
Ghidra/Features/Base/src/main/java/ghidra/formats/gfilesystem/FileSystemInstanceManager.java