+ /**
+ * Should this layout definition always be written to the document preamble?
+ * Possible values are:
+ * 0: Do not enforce local layout
+ * >=1: Enforce local layout with version forcelocal
+ * -1: Enforce local layout with infinite version
+ * On reading, the forced local layout is only used if its version
+ * number is greater than the version number of the same layout in the
+ * document class. Otherwise, it is ignored.
+ */
+ int forcelocal;