\setupbackend[export=yes]

\definefontsynonym [Dingbats] [name:dingbats] [features=dingbats]

\starttext

Hello world!
(\getnamedglyphdirect{Dingbats}{a79})
(\getnamedglyphdirect{Dingbats*dingbats}{a79})
(\getglyphdirect{Dingbats*dingbats}{\number"2756})
({\definedfont[Dingbats]\char"2756})

\stoptext
