+ModestTnyFolderRules modest_tny_folder_get_rules (TnyFolder *folder);
+
+
+/**
+ * modest_tny_folder_get_help_id:
+ * @folder: a valid tnymail folder
+ *
+ * get the help_id for this folder
+ *
+ * Returns: get the help_id for this folder, or NULL in case of error
+ */
+const gchar* modest_tny_folder_get_help_id (TnyFolder *folder);
+
+
+/**
+ * modest_tny_folder_is_outbox_for_account:
+ * @folder: a valid tnymail folder
+ *
+ * Discover whether this folder is the per-account outbox for the specified
+ * account.
+ *
+ * Returns: TRUE if this folder is the per-account outbox for the account.
+ */
+gboolean modest_tny_folder_is_outbox_for_account (TnyFolder *folder,
+ TnyAccount *account);
+
+/**
+ * modest_tny_folder_get_account:
+ * @folder: a folder
+ *
+ * Get the parent account of the folder or, for TnyMergeFolder
+ * instances, get the local-folders account.
+ *
+ * Returns: the account. You should call g_object_unref() on this.
+ */
+TnyAccount *modest_tny_folder_get_account (TnyFolder *folder);
+
+/**
+ * modest_tny_msg_get_header_unique_id:
+ * @header: a #TnyHeader
+ *
+ * This function returns a unique id for a message summary from
+ * a TnyHeader retrieved with tny_folder_get_headers. You can not use
+ * the TnyHeader returned by tny_msg_get_header because it has no uid.
+ *
+ * This uid is built from the folder URL string and the header uid,
+ * the caller of the function must free the unique id when no longer
+ * needed
+ *
+ * Returns: a unique identificator for a header object
+ **/
+gchar* modest_tny_folder_get_header_unique_id (TnyHeader *header);
+
+/**
+ * modest_tny_folder_has_subfolder_with_name:
+ * @folder: a #TnyFolderStore
+ * @name: the name to check into subfolders.
+ * @nonstrict: if TRUE, also match on different-case and current-locale
+ * display versions of the name
+ *
+ * This function check if subfolders of @folder has the same
+ * name as @name.
+ *
+ * Returns: TRUE if some subfolder has the name @name.
+ **/
+gboolean modest_tny_folder_has_subfolder_with_name (TnyFolderStore *folder,
+ const gchar *name,
+ gboolean nonstrict);
+
+/**
+ * modest_tny_folder_is_ancestor:
+ * @folder: a #TnyFolder
+ * @ancestor: a #TnyFolderStore
+ *
+ * This function checks if @ancestor is an ancestor of @folder
+ *
+ * Returns: TRUE if @ancestor is an ancestor of @folder, FALSE
+ * otherwise
+ **/
+gboolean modest_tny_folder_is_ancestor (TnyFolder *folder,
+ TnyFolderStore *ancestor);
+
+/**
+ * modest_tny_folder_store_find_folder_from_uri:
+ * @folder_store: a #TnyFolderStore
+ * @uri: a string
+ *
+ * This method tries to find a folder in @folder_store. The idea is
+ * being as fast as possible being synchronous. This is accomplished
+ * avoiding network access.
+ *
+ * Returns: %NULL if folder is not found, or a #TnyFolder.
+ */
+TnyFolder *modest_tny_folder_store_find_folder_from_uri (TnyFolderStore *folder_store, const gchar *uri);
+
+/**
+ * modest_tny_folder_get_display_name:
+ * @folder: a #TnyFolder
+ *
+ * obtain the display name for @folder
+ *
+ * Returns: a newly allocated string
+ */
+gchar * modest_tny_folder_get_display_name (TnyFolder *folder);