| Header |
| EntityEnclosingRequestInterface | HTTP request that sends an entity-body in the request message (POST, PUT) |
| MessageInterface | Request and response message interface |
| PostFileInterface | POST file upload |
| RequestFactoryInterface | Request factory used to create HTTP requests |
| RequestInterface | Generic HTTP request interface |
| AbstractMessage | Abstract HTTP request/response message |
| EntityEnclosingRequest | HTTP request that sends an entity-body in the request message (POST, PUT, PATCH, DELETE) |
| Header | Represents a header and all of the values stored by that header |
| PostFile | POST file upload |
| Request | HTTP request class to send requests |
| RequestFactory | Default HTTP request factory used to create the default {@see Request} and {@see EntityEnclosingRequest} objects. |
| Response | Guzzle HTTP response object |