title: Web Service thru Spring boot
body: <p>I am referring someone code and not getting what exactly is the meaning of the below code as its throwing error when they are calling like sdServices.topup(null, null, null, topupRequest)</p>
  
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  <pre class="snippet-code-js lang-js prettyprint-override"><code>  @WebMethod(operationName = "Topup")
      @WebResult(name = "topupResponse", targetNamespace = "http://www.utiba.com/xml/ns/sdp/soap/service/v3", partName = "TopupResponse")
      public StandardResponse topup(
          @WebParam(partName = "ClientId", name = "clientId", targetNamespace = "http://www.utiba.com/xml/ns/sdp/soap/service/v3", header = true)
          java.lang.String clientId,
          @WebParam(partName = "TerminalId", name = "terminalId", targetNamespace = "http://www.utiba.com/xml/ns/sdp/soap/service/v3", header = true)
          java.lang.String terminalId,
          @WebParam(partName = "CardData", name = "cardData", targetNamespace = "http://www.amdocs.com/xml/ns/card/soap/v1", header = true)
          com.amdocs.xml.ns.card.soap.v1.CardData cardData,
          @WebParam(partName = "TopupRequest", name = "topupRequest", targetNamespace = "http://www.utiba.com/xml/ns/sdp/soap/service/v3")
          TopupRequest topupRequest
      ) throws SDPValidationFault_Exception, SDPFault_Exception;</code></pre>
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  </p>