* Gets the singleton signature for a SubTileEntity class. Registers a fallback if one wasn't registered
* before the call.
*/
public static SubTileSignature getSignatureForClass(Class<? extends SubTileEntity> subtileClass) {
if(!subTileSignatures.containsKey(subtileClass))
registerSubTileSignature(subtileClass, new BasicSignature(subTiles.inverse().get(subtileClass)));
return subTileSignatures.get(subtileClass);
}