/// <summary>
 /// Retrieves the policy set definitions for a subscription.
 /// </summary>
 /// <remarks>
 /// This operation retrieves a list of all the policy set definitions in a
 /// given subscription that match the optional given $filter. Valid values for
 /// $filter are: 'atExactScope()', 'policyType -eq {value}' or 'category eq
 /// '{value}''. If $filter is not provided, the unfiltered list includes all
 /// policy set definitions associated with the subscription, including those
 /// that apply directly or from management groups that contain the given
 /// subscription. If $filter=atExactScope() is provided, the returned list only
 /// includes all policy set definitions that at the given subscription. If
 /// $filter='policyType -eq {value}' is provided, the returned list only
 /// includes all policy set definitions whose type match the {value}. Possible
 /// policyType values are NotSpecified, BuiltIn and Custom. If
 /// $filter='category -eq {value}' is provided, the returned list only includes
 /// all policy set definitions whose category match the {value}.
 /// </remarks>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='nextPageLink'>
 /// The NextLink from the previous successful call to List operation.
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <IPage <PolicySetDefinition> > ListNextAsync(this IPolicySetDefinitionsOperations operations, string nextPageLink, CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.ListNextWithHttpMessagesAsync(nextPageLink, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }