Library createLibrary(@NotNull @NonNls String name, @NotNull LibraryLevel level,
                        VirtualFile @NotNull [] classRoots, VirtualFile @NotNull [] sourceRoots);
Library createLibrary(@NotNull @NonNls String name, @NotNull LibraryLevel level,
                        VirtualFile @NotNull [] classRoots, VirtualFile @NotNull [] sourceRoots)