code: public ChannelMapping withOutputChannels(OutputChannelMapping... outputChannels) {
          if (this.outputChannels == null) {
              setOutputChannels(new java.util.ArrayList<OutputChannelMapping>(outputChannels.length));
          }
          for (OutputChannelMapping ele : outputChannels) {
              this.outputChannels.add(ele);
          }
          return this;
      }
docs: List of output channels
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setOutputChannels(java.util.Collection)} or {@link #withOutputChannels(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param outputChannels
  List of output channels
  @return Returns a reference to this object so that method calls can be chained together.