Returns the font view over a font dictionary of this document.
public PdfFont? GetFont(CosObject? font)
A font dictionary, or an indirect reference to one, such as an entry of a resource dictionary's Font subdictionary.
Subtype selects; null when font is not a
dictionary and does not refer to one. The same dictionary always gives the same view instance.
ISO 32000-2 §9.5, Table 108, and §7.8.3.