The Drools and jBPM internal API which is NOT backwards compatible between releases.
'org.drools:knowledge-internal-api:5.4.0.Beta2'
<dependency>
<groupId>org.drools</groupId>
<artifactId>knowledge-internal-api</artifactId>
<version>5.4.0.Beta2</version>
</dependency>
<dependency org="org.drools" name="knowledge-internal-api" rev="5.4.0.Beta2"/>
"org.drools", "knowledge-internal-api", "5.4.0.Beta2"