This code defines a method called `all_responses` which uses a...

This code defines a method called all_responses which uses a loop to iterate over the results of a client object.

On each iteration, the result is stored in an array using the push method. This creates a nested array since each result is an array itself.

After all results have been iterated over, the nested array is flattened into a single array using the flatten method. Then, the uniq method is called on the flattened array to remove any duplicate values.

The final result returned by the method is an array containing all unique responses from the client.