public Either <RfcErrorInfo, IFunctionDescriptionHandle> GetFunctionDescription(IFunctionHandle functionHandle)
{
Logger.IfSome(l => l.LogTrace("reading function description by function handle", functionHandle));
IFunctionDescriptionHandle handle = NativeApi.GetFunctionDescription(functionHandle as FunctionHandle, out var errorInfo);
return(ResultOrError(handle, errorInfo));
}