id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	difficulty
934	improve documentation for functors and named interfaces	felix winkelmann		"The documentation for functors and interfaces (as defined by `define-interface`) needs to be expanded and improved, and examples added.

(Suggested by Matt Gushee)
"	defect	new	minor	someday	documentation	4.8.x		functor interface		easy