code: public DescribePipelinesResult withPipelineDescriptionList(PipelineDescription... pipelineDescriptionList) {
          if (this.pipelineDescriptionList == null) {
              setPipelineDescriptionList(new com.amazonaws.internal.SdkInternalList<PipelineDescription>(pipelineDescriptionList.length));
          }
          for (PipelineDescription ele : pipelineDescriptionList) {
              this.pipelineDescriptionList.add(ele);
          }
          return this;
      }
docs: <p>
  An array of descriptions for the specified pipelines.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPipelineDescriptionList(java.util.Collection)} or
  {@link #withPipelineDescriptionList(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param pipelineDescriptionList
  An array of descriptions for the specified pipelines.
  @return Returns a reference to this object so that method calls can be chained together.