+@RET@ FcPattern *
+@FUNC@ FcPatternFilter
+@TYPE1@ FcPattern * @ARG1@ p
+@TYPE2@ const FcObjectSet * @ARG1@ os
+@PURPOSE@ Filter the objects of pattern
+@DESC@
+Returns a new pattern that only has those objects from
+<parameter>p</parameter> that are in <parameter>os</parameter>.
+If <parameter>os</parameter> is NULL, a duplicate of
+<parameter>p</parameter> is returned.
+@@
+