front-end/interaction in drscheme:language:language<%>
This method is just like
front-end/complete-program except that it is called with program fragments,
for example the expressions entered in the interactions
window. It is also used in other contexts by
tools to expand single expressions.
(-> (-> (union sexp syntax eof))senda-drscheme:language:languagefront-end/interactionportsettings)
port: input-port
settings: settings