/// <summary>
/// Create a new <Sub/> element and append it as a child of this element.
/// </summary>
/// <param name="words"> Words to be substituted, the body of the TwiML Element. </param>
/// <param name="alias"> Substitute a different word (or pronunciation) for selected text such as an acronym or
/// abbreviation </param>
public Say Sub(string words = null, string alias = null)
{
var newChild = new SsmlSub(words, alias);
this.Append(newChild);
return(this);
}
public Say SsmlSub(SsmlSub ssmlSub)
{
this.Append(ssmlSub);
return(this);
}