+LY_DEFINE (ly_paper_book_performances, "ly:paper-book-performances",
+ 1, 0, 0, (SCM paper_book),
+ "Return performances in book @var{paper-book}.")
+{
+ LY_ASSERT_SMOB (Paper_book, paper_book, 1);
+ return unsmob_paper_book (paper_book)->performances ();
+}
+