gint category_change_type(Category *item, gboolean isIncome);
gboolean category_load_csv(gchar *filename, gchar **error);
gboolean category_save_csv(gchar *filename, gchar **error);
gint category_change_type(Category *item, gboolean isIncome);
gboolean category_load_csv(gchar *filename, gchar **error);
gboolean category_save_csv(gchar *filename, gchar **error);