code: func (r Network_Storage) GetAllowableHardware(filterHostname *string) (resp []datatypes.Hardware, err error) {
  	params := []interface{}{
  		filterHostname,
  	}
  	err = r.Session.DoRequest("SoftLayer_Network_Storage", "getAllowableHardware", params, &r.Options, &resp)
  	return
  }
docs: // This method retrieves a list of SoftLayer_Hardware that can be authorized to this SoftLayer_Network_Storage.