an>
    <span class='id identifier rubyid_fail'>fail</span> <span class='const'>ArgumentError</span><span class='comma'>,</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>Missing the required parameter &#39;address_id&#39; when calling WalletStakeApi.get_staking_operation</span><span class='tstring_end'>&quot;</span></span>
  <span class='kw'>end</span>
  <span class='comment'># verify the required parameter &#39;staking_operation_id&#39; is set
</span>  <spa