+
+ /** \return \b true if it's OK for MarkInstall to install
+ * the given package.
+ *
+ * See the default implementation for a simple example how this
+ * method can be used.
+ * Overriding implementations should use the hold-state-flag to cache
+ * results from previous checks of this package - also it should
+ * be used if the default resolver implementation is also used to
+ * ensure that these packages are handled like "normal" dpkg holds.
+ *
+ * The parameters are the same as in the calling MarkInstall:
+ * \param Pkg the package that MarkInstall wants to install.
+ * \param AutoInst needs a previous MarkInstall this package?
+ * \param Depth recursive deep of this Marker call
+ * \param FromUser was the install requested by the user?
+ */
+ virtual bool IsInstallOk(const PkgIterator &Pkg,bool AutoInst = true,
+ unsigned long Depth = 0, bool FromUser = true);
+
+ /** \return \b true if it's OK for MarkDelete to remove
+ * the given package.
+ *
+ * See the default implementation for a simple example how this
+ * method can be used.
+ * Overriding implementations should use the hold-state-flag to cache
+ * results from previous checks of this package - also it should
+ * be used if the default resolver implementation is also used to
+ * ensure that these packages are handled like "normal" dpkg holds.
+ *
+ * The parameters are the same as in the calling MarkDelete:
+ * \param Pkg the package that MarkDelete wants to remove.
+ * \param Purge should we purge instead of "only" remove?
+ * \param Depth recursive deep of this Marker call
+ * \param FromUser was the remove requested by the user?
+ */
+ virtual bool IsDeleteOk(const PkgIterator &Pkg,bool Purge = false,
+ unsigned long Depth = 0, bool FromUser = true);
+