$search_settings->set('index.overlap_cjk', $form_state->getValue('overlap_cjk'));
// Specifically mark items in the default index for reindexing, since
// these settings are used in the search_index() function.
$search_settings->set('index.overlap_cjk', $form_state->getValue('overlap_cjk'));
// Specifically mark items in the default index for reindexing, since
// these settings are used in the search_index() function.