code: public DescribeActivationsResult withActivationList(Activation... activationList) {
          if (this.activationList == null) {
              setActivationList(new com.amazonaws.internal.SdkInternalList<Activation>(activationList.length));
          }
          for (Activation ele : activationList) {
              this.activationList.add(ele);
          }
          return this;
      }
docs: <p>
  A list of activations for your AWS account.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setActivationList(java.util.Collection)} or {@link #withActivationList(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param activationList
  A list of activations for your AWS account.
  @return Returns a reference to this object so that method calls can be chained together.