import { VoyageAIEmbedding } from "@llamaindex/voyage-ai";import { Document, Settings, VectorStoreIndex } from "llamaindex";Settings.embedModel = new VoyageAIEmbedding();const document = new Document({ text: essay, id_: "essay" });const index = await VectorStoreIndex.fromDocuments([document]);const queryEngine = index.asQueryEngine();const query = "What is the meaning of life?";const results = await queryEngine.query({ query,});