| An *infallible two way method* is a FIDL method that cannot return an error | |
| value. The only possible failure modes are if the underlying | |
| [channel][channel-doc-link] has a failure (like failing to connect to one of | |
| the endpoints). | |
| <<../examples/calculator/_callout.md>> | |
| <<../examples/calculator/_baseline_tutorial.md>> | |
| [channel-doc-link]: /docs/reference/kernel_objects/channel.md |