| A *protocol end* represents one endpoint of a channel connection over which some |
| specified FIDL protocol is spoken. The server side of this connection is the |
| `server_end`, while the client side is the `client_end`. |
| |
| Protocol ends have a required constraint, specifying the FIDL protocol being |
| spoken over the connection. For instance, `client_end:Foo` represents the client |
| endpoint of a Zircon channel over which all messages exchanged will conform to |
| methods and events defined in that FIDL protocol, while `server_end:Foo` |
| represents the opposite endpoint. |
| |
| <<../examples/key_value_store/_callout.md>> |
| <<../examples/key_value_store/_add_iterator_tutorial.md>> |
