code: public DescribeVoicesResult withVoices(Voice... voices) {
          if (this.voices == null) {
              setVoices(new java.util.ArrayList<Voice>(voices.length));
          }
          for (Voice ele : voices) {
              this.voices.add(ele);
          }
          return this;
      }
docs: <p>
  A list of voices with their properties.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVoices(java.util.Collection)} or {@link #withVoices(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param voices
  A list of voices with their properties.
  @return Returns a reference to this object so that method calls can be chained together.