// Converts to u16string before adding.
public void AddText(string text)
{
var icu_text = icu.UnicodeString.fromUTF8(text);
std::u16string u16_text = new std::u16string(icu_text.getBuffer(), icu_text.getBuffer() + icu_text.length());
AddText(u16_text);
}
// Adds text to the builder. Forms the proper runs to use the upper-most style
// on the style_stack_;
public void AddText(std::u16string text)
{
text_.AddRange(text);
}