public void setSpamPercentage(Double spamPercentage) {
        this.spamPercentage = spamPercentage;
    }
<p>
The percentage of emails that arrived in recipients' spam or junk mail folders during the predictive inbox
placement test.
</p>

@param spamPercentage
       The percentage of emails that arrived in recipients' spam or junk mail folders during the predictive inbox
       placement test.
aws-java-sdk-pinpointemail/src/main/java/com/amazonaws/services/pinpointemail/model/PlacementStatistics.java