Is it possible to implement a custom chunking function into the flow?

[Paradoxinit]

I want to embed a code-base into a Graph Rag using the cAST chunking method (https://arxiv.org/pdf/2506.15655)
In addition to the chunk text, I also want to store the node.type (function, import, condition-block, etc) resulting from the tree-sitter object.
So my question is, whether am I able to implement a custom chunking function? If so, can the function return more parameters in addition to the chunk text?

[Paradoxinit]

Ok, I just saw the custom operation section in the docs. I will try that to see if it gives me the expected results. Feel free to suggest alternative ways 😄

[georgeh0]

Yes, custom function is the way to go :)