The file org.alfresco.service.cmr.repository.TransformationSourceOptions declares a method public List<String> getApplicabledMimetypes(); - note the additional 'd'.
Its subclass AbstractTransformationSourceOptions defines public void setApplicableMimetypes(List<String> applicabledMimetypes) - note that this doesn't have the extra 'd'.
This is not a big issue, obviously. But it does mean that applicableMimeTypes would not be seen as a single JavaBean property and so the error should be fixed.
If this method constitutes a published API, we should deprecate the one with the 'd' and add the correctly spelled one.