code: func (client *Client) GetServiceInstanceSharedFrom(serviceInstanceGUID string) (ServiceInstanceSharedFrom, Warnings, error) {
  	request, err := client.newHTTPRequest(requestOptions{
  		RequestName: internal.GetServiceInstanceSharedFromRequest,
  		URIParams:   Params{"service_instance_guid": serviceInstanceGUID},
  	})
  	if err != nil {
  		return ServiceInstanceSharedFrom{}, nil, err
  	}
  
  	var serviceInstanceSharedFrom ServiceInstanceSharedFrom
  	response := cloudcontroller.Response{
  		DecodeJSONResponseInto: &serviceInstanceSharedFrom,
  	}
  
  	err = client.connection.Make(request, &response)
  	return serviceInstanceSharedFrom, response.Warnings, err
  }
docs: // GetServiceInstanceSharedFrom returns back a ServiceInstanceSharedFrom
  // object.