Eclipse drools plugin - drools jars dissappear from drools library when internal classes are switched from Discouraged to Accesible

When I set Drools internal classes from Discouraged to Accessible in Eclipse, then the jars dissapear from Drools library in Library screen of project. I have thought that setting internal classes to Accesible would remove several warnings from our test suite, but actual result is that there is just Drools library which is without jars.