WarcHdfsSpec not found

[dportabella]

I try to follow your tutorial, using spark-shell instead of jupyther. I've tried with archivespark version 2.5 and 2.7. Spark version 2.2.1, Scala version 2.11.8, Java 1.8.0_112.
It fails as follows:

$ spark-shell --verbose --packages "com.github.helgeho:archivespark_2.11:2.7"

scala> import de.l3s.archivespark._
import de.l3s.archivespark._

scala> import de.l3s.archivespark.specific.warc.specs.WarcHdfsSpec
<console>:26: error: object WarcHdfsSpec is not a member of package de.l3s.archivespark.specific.warc.specs
       import de.l3s.archivespark.specific.warc.specs.WarcHdfsSpec

[dportabella]

duplicate: #2