type, which is currently "jpeg",
"png", "ico" or "bmp". If error is set, FALSE will be returned. See
gdkPixbufSaveToCallback for more details.gdkPixbufSaveToCallbackv(object, save.func, user.data, type, option.keys, option.values, .errwarn = TRUE)save.funcGdkPixbufSaveFunc] a function that is called to save each block of data that
the save routine generates.user.datatypeoption.keysNULL-terminatedoption.valueserrorGError] return location for error, or NULL