static PrimitiveCodec<?> getCodec(byte sel) {
			PrimitiveCodec<?> obj = CODECS_BY_SELECTOR.get(sel);
			if (obj == null) {
				throw new IllegalArgumentException("No variant codec with selector " + sel);
			}
			return obj;
		}
Get the codec for the given selector

@param sel the selector
@return the codec
@throws IllegalArgumentException if the selector is unknown
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/util/database/DBCachedObjectStoreFactory.java