public DescribePlacementGroupsResult withPlacementGroups(java.util.Collection<PlacementGroup> placementGroups) {
        setPlacementGroups(placementGroups);
        return this;
    }
<p>
Information about the placement groups.
</p>

@param placementGroups
       Information about the placement groups.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/DescribePlacementGroupsResult.java