This callback may declare multiple methods:

 {
   initServiceClient: function() {
       // Create and return the internal service client object.
       // This is usually optional, except in the case of SOAP services.
   },

   // svc is the call-specific Service instance. For example, it may be an HTTPService or FTPService.
   // params are the arguments passed to the call method (if any).
   createRequest: function(svc:Service, params) {
        // Perform any required call-time configuration.
        // Optionally return a Service-specific object
   },

   // svc is the call-specific Service instance.
   // arg is the output of createRequest.
   execute: function(svc:Service, arg:Object) {
        // Execute the service call and return a result
        // This method is not used by default for HTTP-related services unless executeOverride is set.
   },

   // Use the execute function if it is present. This is only required to use the functionality with HTTP services.
   executeOverride: true,

   // svc is the call-specific Service instance.
   // response is the output of execute.
   parseResponse: function(svc:Service, response: Object) {
        // Process the response object as needed.
        // The return value of this method will be the return value of the outer call method.
   },

   // svc is the call-specific Service instance.
   // arg is the output of createRequest.
   mockCall: function(svc:Service, arg:Object) {
        // This method takes the place of the 'execute' phase when mocking is enabled.
        // Note initServiceClient, createRequest, and parseResponse still invoked.
   },

   // svc is the call-specific Service instance.
   // params are the arguments passed to the call method (if any).
   mockFull: function(svc:Service, params) {
        // This method takes the place of the entire service call when mocking is enabled.
        // No other callbacks are invoked. The output of this method becomes the output of call.
   }

 }