OptionalchildDocumentRetriever?: Toolkit<Toolkit>A custom retriever to use when retrieving instead of
the .similaritySearch method of the vectorstore.
OptionaldocumentCompressor?: BaseDocumentCompressorOptionaldocumentCompressorFilteringFn?: (docs: SubDocs) => SubDocsOptionalparentSplitter?: Toolkit
Interface for the fields required to initialize a ParentDocumentRetriever instance.