private boolean ensureChunkAvailable() throws IOException {
		return currentChunk == null || chunkPos >= currentChunk.length ? readNextChunk() : true;
	}
Function implemented by subclasses to do the stream processing of next
chunk in stream.

@return True if more data is now available, False otherwise.
@throws IOException If there is a read failure of the data
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/cart/CartV1StreamProcessor.java