I have constructed a SummaryIndex from a collection of nodes. I throw away the nodes. From the SummaryIndex stored in memory, what is the best way to retrieve the collection of nodes? Should I do so via the docstore? I would have thought that a get_nodes() function on the SummaryIndex instance would be useful (it should be defined on a parent class in the class hierarchy), maybe ComponentIndex. Why do I say this? Because when querying, I assume you must iterate over the list of nodes, so there should be an efficient way to access them. Thanks.
I answered my own questions by searching the source code of LlamaIndex: nodes = summary_index._index_struct.nodes, which involves accessing a private variable. This is useful to learn and use the code, but I should obviously not use this approach in any code I wish to deploy. Do the maintainers of LlamaIndex simply assume that this function is not necessary or useful?
