You can find an example of such beans here:
https://github.com/jboss-developer/jboss-sandbox-quickstarts/blob/master/batch-processing/src/main/java/org/jboss/as/quickstarts/batch/job/RecordsReader.java#L38

1. Import https://github.com/jboss-developer/jboss-sandbox-quickstarts/ as an exisitng maven project
2. Open batch-processing/src/main/java/org/jboss/as/quickstarts/batch/job/RecordsReader.java
3. There should not be warning messages about no eligible beans for separatorRegex and fileName properties.
4. OpenOns for these properties should open import-file.xml and select the corresponding properties.