code: func (r Provisioning_Maintenance_Window) GetMaintenanceClassifications() (resp []datatypes.Provisioning_Maintenance_Classification, err error) {
  	err = r.Session.DoRequest("SoftLayer_Provisioning_Maintenance_Window", "getMaintenanceClassifications", nil, &r.Options, &resp)
  	return
  }
docs: // getMaintenanceClassifications() returns an object of maintenance classifications