public void setRuleSets(java.util.Collection<ReceiptRuleSetMetadata> ruleSets) {
        if (ruleSets == null) {
            this.ruleSets = null;
            return;
        }

        this.ruleSets = new com.amazonaws.internal.SdkInternalList<ReceiptRuleSetMetadata>(ruleSets);
    }
<p>
The metadata for the currently active receipt rule set. The metadata consists of the rule set name and the
timestamp of when the rule set was created.
</p>

@param ruleSets
       The metadata for the currently active receipt rule set. The metadata consists of the rule set name and the
       timestamp of when the rule set was created.
aws-java-sdk-ses/src/main/java/com/amazonaws/services/simpleemail/model/ListReceiptRuleSetsResult.java