get https://apis.xbim-dev.net//iot/2.0//Conversion(,)
Summary:Get conversion factor betwee two inits. These two units must have a common ancestor in the
units definition hierarchy (conversion based units poin to Xbim.Flex.IOT.Services.Contracts.UnitDto.ConversionBaseUnit) (Auth policies: IotRead).
Return Type: ConversionDto