Return empty string if Service Description does not include VoID elements
Return empty string if Service Description does not include VoID elements

dbcls/umakadata,dbcls/umakadata,level-five/umakadata-1,level-five/umakadata-1,dbcls/umakadata,level-five/umakadata-1,dbcls/umakadata,level-five/umakadata-1