# LibTmux::Operation::then

- **Module:** LibTmux
- **Package:** LibTmux
- **Language:** Perl
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-perl/blob/352715a4fa66a96eed7763b90daaa536aa2f121d/packages/core/lib/LibTmux/Operation.pm#L27
- **Page:** https://libtmux.org/en/perl/latest/reference/libtmux-operation-then/

```
sub then($self, $callback)
```

Compose a local transformation returning one value or another Operation. Exceptions retain their original identity.

## Methods

## Parameters

- `callback`