public java.util.List<StackInstanceResourceDriftsSummary> getSummaries() {
        if (summaries == null) {
            summaries = new com.amazonaws.internal.SdkInternalList<StackInstanceResourceDriftsSummary>();
        }
        return summaries;
    }
<p>
A list of <code>StackInstanceResourceDriftsSummary</code> structures that contain information about the specified
stack instances.
</p>

@return A list of <code>StackInstanceResourceDriftsSummary</code> structures that contain information about the
        specified stack instances.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/ListStackInstanceResourceDriftsResult.java