/// ------------------------------------------------------------------------------------
/// <summary>
/// Create a back translation from a format string, and attach it to the
/// given paragraph.
/// </summary>
/// <param name="scrInMemoryCache">in-memory cache to use for testing</param>
/// <param name="book">book to use</param>
/// <param name="para">the paragraph that will own this back translation</param>
/// <param name="format">(See CreateText for the definition of the format string)</param>
/// <param name="ws">writing system of the back translation</param>
/// ------------------------------------------------------------------------------------
internal static void AddBackTranslation(ScrInMemoryFdoCache scrInMemoryCache, IScrBook book,
StTxtPara para, string format, int ws)
{
ICmTranslation cmTrans = para.GetOrCreateBT();
// Set the translation string for the given WS
cmTrans.Translation.GetAlternative(ws).UnderlyingTsString =
ScrInMemoryFdoCache.CreateFormatText(book, null, format, ws);
}