SentenceSplitter
. How do I change this to do code aware chunking?from llama_index.text_splitter import CodeSplitter import tiktoken text_splitter = CodeSplitter( separator=" ", chunk_size=1024, chunk_overlap=20, tokenizer=tiktoken.encoding_for_model("gpt-3.5-turbo").encode ) node_parser = SimpleNodeParser.from_defaults(text_splitter=text_splitter)