The problem was that there is no special entity for libraries
in the IntelliJ model, and when we have an element for a library
we have to search through all of its dependencies
(see getOrderEntriesForFile call in collectInfosByVirtualFile)
But for popular library there could be quite a lot of dependencies,
while in most cases we need only the first one to obtain module
info for library itself (see changed usage in resolverForElement).
So it's worth replacing List with Sequence here
Denis Zharkov
b4e5f8cf1c