code: func (s *ArraySchema) Prop(key string) (interface{}, bool) {
  	if s.Properties != nil {
  		if prop, ok := s.Properties[key]; ok {
  			return prop, true
  		}
  	}
  
  	return nil, false
  }
docs: // Prop gets a custom non-reserved property from this schema and a bool representing if it exists.