| *Named payloads* are `struct`, `table`, or `union` types that are used directly |
| as method request or response payloads. These can be used in cases where a |
| method payload would otherwise be repeated or is already a named type used |
| elsewhere in the FIDL file. |
| |
| In the following example, the added `ReadItem` method is notably different from |
| the existing `WriteItem`, using an already existing named type as the payload, |
| rather than a repetitive inline definition. |
| |
| <<../examples/key_value_store/_callout.md>> |
| <<../examples/key_value_store/_add_read_item_tutorial.md>> |
