# gdtest_dunders > A synthetic test package with dunder methods ## Docs ### API Reference #### Classes > Main classes provided by the package - [Collection](reference/Collection.html): A custom collection with dunder methods #### Collection Methods > Methods for the Collection class - [Collection.__repr__](reference/Collection.__repr__.html) - [Collection.__eq__](reference/Collection.__eq__.html) - [Collection.__len__](reference/Collection.__len__.html) - [Collection.__getitem__](reference/Collection.__getitem__.html) - [Collection.add](reference/Collection.add.html) - [Collection.clear](reference/Collection.clear.html)