culturegraph/metafacture-core — pull request #119 by fsteeg (2013-07-19 14:44:05+00:00)
Title: Add `@Out(Void.class)` annotations to writer implementations

The IDE uses the `@In` and `@Out` annotations to validate workflows. It issues warnings when no annotation is found. Since the writers don't actually output anything as part of the workflow, `Void.class` might make sense as their output type.