Retriever - LlamaIndex 🦙 0.8.49

Retrievers are responsible for fetching the most relevant context given a user query (or chat message). It can be built on top of Indices, but can also be defined independently. It is used as a key building block in Query Engines (and Chat Engines) for retrieving relevant context. Tip Confused about where retriever fits in the pipeline? Read about high-level concepts Get started with: 🦙