Whats going on here 😩 ? (refer the image attached) Context : I was trying to use the semantic chunking feature in Llamaindex. Now I need to build a vector index based on the nodes I created earlier. Going thorough the documentation I came across the build_index_from_nodes method , now this should work similar to the from_documents method right ? well not really !! why is that ? am i missing something here ? after spending way too much time on this I just tried passing in the arguments directly to VectorStoreIndex , and it worked !??? so then whats the point of build_index_from_nodes ?? Can some help me understand whats going on here ??