public ListReceiptRuleSetsResult withRuleSets(ReceiptRuleSetMetadata... ruleSets) {
        if (this.ruleSets == null) {
            setRuleSets(new com.amazonaws.internal.SdkInternalList<ReceiptRuleSetMetadata>(ruleSets.length));
        }
        for (ReceiptRuleSetMetadata ele : ruleSets) {
            this.ruleSets.add(ele);
        }
        return this;
    }
<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>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setRuleSets(java.util.Collection)} or {@link #withRuleSets(java.util.Collection)} if you want to override
the existing values.
</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.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ses/src/main/java/com/amazonaws/services/simpleemail/model/ListReceiptRuleSetsResult.java