code: func (r Virtual_Guest_Block_Device_Template_Group) GetBlockDevicesDiskSpaceTotal() (resp datatypes.Float64, err error) {
  	err = r.Session.DoRequest("SoftLayer_Virtual_Guest_Block_Device_Template_Group", "getBlockDevicesDiskSpaceTotal", nil, &r.Options, &resp)
  	return
  }
docs: // Retrieve The total disk space of all images in a image template group.