How to connect es5 in the latest mainline code?

[ipconfig]

Hi：
    I want to know how to connect to es5 in the latest mainline code. I read 
the es5 theme in the official documentation and mailing list, but I didn't find 
the answer.
        I tried to connect es5 in the latest mainline code, but it failed.
        I modified the es version in pom.xml to be the same as the version in 
the calcite 1.16-elasticsearch5 directory (5.5.2), but the compiler will report 
an error with the error message: Could not find artifact 
org.elasticsearch.client:elasticsearch-rest -client:jar:5.5.2 in central 
(https://repo.maven.apache.org/maven2)
        My model.json is as follows: {
   "version": "1.0",
   "defaultSchema": "elasticsearch",
   "schemas": [
     {
       "type": "custom",
       "name": "elasticsearch",
       "factory": 
"org.apache.calcite.adapter.elasticsearch.ElasticsearchSchemaFactory",
       "operand": {
         "coordinates": "{'10.95.26.17': 9200}"
       }
     }
   ]
}