Returns information about one or more PlacementGroup instances
            in a user's account.
            
 Declaration Syntax
 Declaration Syntax| C# | 
DescribePlacementGroupsResponse DescribePlacementGroups( DescribePlacementGroupsRequest request )
 Parameters
 Parameters- request (DescribePlacementGroupsRequest)
- Describe Placement Groups request
 Return Value
 Return ValueDescribe Placement Groups  Response from the service
 Exceptions
 Exceptions| Exception | Condition | 
|---|---|
| WebException | |
| AmazonEC2Exception |