Hash mapping a known class or module to the stores
it can be loaded from
# File lib/rdoc/ri/driver.rb, line 587
def classes
return @classes if @classes
@classes = {}
@stores.each do |store|
store.cache[:modules].each do |mod|
# using default block causes searched-for modules to be added
@classes[mod] ||= []
@classes[mod] << store
end
end
@classes
end