Docs on duplicate prevention in addObserver()
Docs on duplicate prevention in addObserver()

Prompted by #36 (Thanks @MPiccinato for asking the question!)

onekiloparsec/siesta,andrewloyola/siesta,bustoutsolutions/siesta,akaralar/siesta,akaralar/siesta,onekiloparsec/siesta,andrewloyola/siesta,bustoutsolutions/siesta