Embeds the program the document's font resolvers find for query, as EmbedFont(ReadOnlyMemory<Byte>, Int32) does.
public PdfCanvasFont? EmbedFont(FontQuery query)
What to look for: a PostScript or family name, and optionally style, weight and a Standard 14 stand-in.
null when no resolver finds a program for the query or the program it finds cannot be embedded.ISO 32000-2 §9.7.4–§9.7.6, §9.8, §9.9 and §9.10.3. A mutation the first time a program is embedded.