$_connection
$_connection : \Elastica\Connection
Elastica Http Transport object.
This function can be used to handle params for queries, filter
$_connection : \Elastica\Connection
__construct(\Elastica\Connection  $connection = null) 
                Construct transport.
| \Elastica\Connection | $connection | Connection object  | 
                            
getConnection() : \Elastica\Connection
Connection object
setConnection(\Elastica\Connection  $connection) : $this
                
| \Elastica\Connection | $connection | Connection object  | 
                            
exec(\Elastica\Request $request, array $params) : \Elastica\Response
Makes calls to the elasticsearch server.
All calls that are made to the server are done through this function
| \Elastica\Request | $request | Request object  | 
                            
| array | $params | Host, Port, ...  | 
                            
Response object
create(mixed $transport, \Elastica\Connection $connection, array $params = array()) : \Elastica\Transport\AbstractTransport
Create a transport.
The $transport parameter can be one of the following values:
| mixed | $transport | A transport definition  | 
                            
| \Elastica\Connection | $connection | A connection instance  | 
                            
| array | $params | Parameters for the transport class  |