code: public ListBackupPlansResult withBackupPlansList(BackupPlansListMember... backupPlansList) {
          if (this.backupPlansList == null) {
              setBackupPlansList(new java.util.ArrayList<BackupPlansListMember>(backupPlansList.length));
          }
          for (BackupPlansListMember ele : backupPlansList) {
              this.backupPlansList.add(ele);
          }
          return this;
      }
docs: <p>
  An array of backup plan list items containing metadata about your saved backup plans.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setBackupPlansList(java.util.Collection)} or {@link #withBackupPlansList(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param backupPlansList
  An array of backup plan list items containing metadata about your saved backup plans.
  @return Returns a reference to this object so that method calls can be chained together.