@Nonnull
    Map<PathType, List<Path>> resolveDependencies(
            @Nonnull Project project, @Nonnull PathScope scope, @Nonnull Collection<PathType> desiredTypes);

    /**
     * Resolves an artifact's meta version (if any) to a concrete version. For example, resolves "1.0-SNAPSHOT"
     * to "1.0-20090208.132618-23" or "RELEASE"/"LATEST" to "2.0".
     * <p>
     * Shortcut for {@code getService(VersionResolver.class).resolve(...)}

    /* The iterator currently returning elements. */
    private Iterator<? extends T> iterator;

    /*
     * We track the "meta iterators," the iterators-of-iterators, below.  Usually, topMetaIterator
     * is the only one in use, but if we encounter nested concatenations, we start a deque of
     * meta-iterators rather than letting the nesting get arbitrarily deep.  This keeps each
     * operation O(1).
     */