OPEN - issue YZABP-181: HT - Fitness 
https://illuminadev.co.uk/jira/browse/YZABP-181

Import the VocabularyInterface
OPEN - issue YZABP-181: HT - Fitness 
https://illuminadev.co.uk/jira/browse/YZABP-181

Provide a __toString method and allow the class to load the [correct]
getTypeOptions method.