How to get nodes relationships with RecursiveCharacterTextSplitter

[Danana1]

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Example Code

python_splitter = RecursiveCharacterTextSplitter.from_language(language=Language.PYTHON, 
                                                                        chunk_size=chunk_size, 
                                                                        chunk_overlap=chunk_overlap)
lc_nodes = python_splitter.split_documents(docs)

Description

I am using RecursiveCharacterTextSplitter to read code files (Python, CPP, JAVA etc).
When observing the split nodes, the metadata contains only: source, content_type, and language.
I also want to get the nodes' relationship. meaning, if a file was split into a few nodes, I want to know the order of the nodes. and if possible, the start char index and end char index.
How can I do that in LangChain RecursiveCharacterTextSplitter?
also want to get

System Info

Name: langchain
Version: 0.2.17