code: public DescribeHapgResult withPartitionSerialList(String... partitionSerialList) {
          if (this.partitionSerialList == null) {
              setPartitionSerialList(new com.amazonaws.internal.SdkInternalList<String>(partitionSerialList.length));
          }
          for (String ele : partitionSerialList) {
              this.partitionSerialList.add(ele);
          }
          return this;
      }
docs: <p>
  The list of partition serial numbers that belong to the high-availability partition group.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPartitionSerialList(java.util.Collection)} or {@link #withPartitionSerialList(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param partitionSerialList
  The list of partition serial numbers that belong to the high-availability partition group.
  @return Returns a reference to this object so that method calls can be chained together.