check whether the elasticsearch index already exists concode_field_sep String SERVER_NAME concode_elem_sep String HTTP_AGENT concode_elem_sep String ES_TYPE_WIKIDATA concode_elem_sep String ES_CLUSTER concode_elem_sep String ES_INDEX concode_elem_sep Settings CLIENT_SETTINGS concode_elem_sep String ES_TYPE_NOMINATIM concode_elem_sep Client ES_CLIENT concode_elem_sep String SETTINGS_FILE concode_elem_sep Config CONFIG concode_elem_sep Node node concode_field_sep void refreshIndex concode_elem_sep Client getClient concode_elem_sep void createIndex
boolean function ( final Client arg0 ) { arg0 . admin ( ) . cluster ( ) . prepareHealth ( ) . setWaitForYellowStatus ( ) . execute ( ) . actionGet ( ) ; return arg0 . admin ( ) . indices ( ) . prepareExists ( ES_INDEX ) . execute ( ) . actionGet ( ) . isExists ( ) ; }