aggregate()
aggregate(string $key, array $value, \Guzzle\Http\QueryString $query) : array
Aggregate multi-valued parameters into a flattened associative array
Parameters
| string | $key | The name of the query string parameter  | 
                            
| array | $value | The values of the parameter  | 
                            
| \Guzzle\Http\QueryString | $query | The query string that is being aggregated  | 
                            
Returns
array —Returns an array of the combined values