public void setVolumeStatistics(VolumeStatistics volumeStatistics) {
        this.volumeStatistics = volumeStatistics;
    }
<p>
An object that contains information about the numbers of messages that arrived in recipients' inboxes and junk
mail folders.
</p>

@param volumeStatistics
       An object that contains information about the numbers of messages that arrived in recipients' inboxes and
       junk mail folders.
aws-java-sdk-pinpointemail/src/main/java/com/amazonaws/services/pinpointemail/model/OverallVolume.java