code: public ListConferenceProvidersResult withConferenceProviders(ConferenceProvider... conferenceProviders) {
          if (this.conferenceProviders == null) {
              setConferenceProviders(new java.util.ArrayList<ConferenceProvider>(conferenceProviders.length));
          }
          for (ConferenceProvider ele : conferenceProviders) {
              this.conferenceProviders.add(ele);
          }
          return this;
      }
docs: <p>
  The conference providers.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setConferenceProviders(java.util.Collection)} or {@link #withConferenceProviders(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param conferenceProviders
  The conference providers.
  @return Returns a reference to this object so that method calls can be chained together.