+Output_property_engraver::Output_property_engraver()
+{
+}
+
+ENTER_DESCRIPTION(Output_property_engraver,
+/* descr */ "Interpret Music of Output_property type, and apply a function
+to any Graphic objects that satisfies the predicate.",
+/* creats*/ "",
+/* acks */ "grob-interface",
+/* reads */ "",
+/* write */ "");