def get_n_objects_of_class dataclass, size
@objects_map_for ||= {}
- raise ArgumentError, 'Argument is not a data class' unless dataclass.is_a? Class
+ raise ArgumentError, 'Argument is not a data class' unless dataclass.is_a? ArvadosBase
raise ArgumentError, 'Argument is not a valid limit size' unless (size && size>0)
# if the objects_map_for has a value for this dataclass, and the