presto-elasticsearch/src/main/java/io/prestosql/elasticsearch/ElasticsearchMetadata.java/ElasticsearchMetadata/getColumnMetadata
class ElasticsearchMetadata:    @Override
    public ColumnMetadata getColumnMetadata(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnHandle columnHandle)
    {
        ElasticsearchColumnHandle handle = (ElasticsearchColumnHandle) columnHandle;
        return makeColumnMetadata(handle.getName(), handle.getType());
    }