code: public ConfigurationAggregator withAccountAggregationSources(AccountAggregationSource... accountAggregationSources) {
          if (this.accountAggregationSources == null) {
              setAccountAggregationSources(new com.amazonaws.internal.SdkInternalList<AccountAggregationSource>(accountAggregationSources.length));
          }
          for (AccountAggregationSource ele : accountAggregationSources) {
              this.accountAggregationSources.add(ele);
          }
          return this;
      }
docs: <p>
  Provides a list of source accounts and regions to be aggregated.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setAccountAggregationSources(java.util.Collection)} or
  {@link #withAccountAggregationSources(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param accountAggregationSources
  Provides a list of source accounts and regions to be aggregated.
  @return Returns a reference to this object so that method calls can be chained together.