long length() throws IOException {
		synchronized (fileSystem) {
			if (folderItem != null) {
				return folderItem.length();
			}
			if (versionedFolderItem != null) {
				return versionedFolderItem.length();
			}
			return 0;
		}
	}
Returns the length of this domain file.  This size is the minimum disk space
used for storing this file, but does not account for additional storage space
used to track changes, etc. 
@return file length
@throws IOException if IO or access error occurs
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/GhidraFileData.java