public boolean isFileFilesystemContainer(FSRL containerFSRL, TaskMonitor monitor)
			throws CancelledException, IOException {
		try (ByteProvider byteProvider = getByteProvider(containerFSRL, false, monitor)) {
			return fsFactoryMgr.test(byteProvider, this, monitor);
		}
	}
Returns true if the container file probably holds one of the currently supported
filesystem types.

@param containerFSRL {@link FSRL} of the file being queried.
@param monitor {@link TaskMonitor} to watch and update progress.
@return boolean true if the file probably is a container, false otherwise.
@throws CancelledException if user cancels.
@throws IOException if IO problem.
Ghidra/Features/Base/src/main/java/ghidra/formats/gfilesystem/FileSystemService.java