Sets text container where the glyphs in the given range are laid out.
- iOS 7.0+
- macOS 10.0+
- tvOS 9.0+
The text container to set.
The range of glyphs to lay out.
This method is used by the layout mechanism and should be invoked only during typesetting, in almost all cases only by the typesetter. For example, a custom typesetter might invoke it.