Confusing config vector search

[katopz]

refer to

genkit/js/testapps/vertexai-vector-search-firestore/src/index.ts

Lines 86 to 94 in 061ab92

	vectorSearchOptions: [
	{
	publicDomainName: VECTOR_SEARCH_PUBLIC_DOMAIN_NAME,
	indexEndpointId: VECTOR_SEARCH_INDEX_ENDPOINT_ID,
	indexId: VECTOR_SEARCH_INDEX_ID,
	deployedIndexId: VECTOR_SEARCH_DEPLOYED_INDEX_ID,
	documentRetriever: firestoreDocumentRetriever,
	documentIndexer: firestoreDocumentIndexer,
	},

I think if I use firestore for vector search, I only need this two?

          documentRetriever: firestoreDocumentRetriever,
          documentIndexer: firestoreDocumentIndexer,

I'm asking because i can't find any detail about how to get other values (no idea what to fill).