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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_domain_class_collection_attribute(ent, attr_name):
 """ Checks if the given attribute name is a aggregate attribute of the given registered resource. """

    attr = get_domain_class_attribute(ent, attr_name)
    return attr.kind == RESOURCE_ATTRIBUTE_KINDS.COLLECTION