public java.util.Map<String, Double> getAdditionalVersionWeights() {
        if (additionalVersionWeights == null) {
            additionalVersionWeights = new com.amazonaws.internal.SdkInternalMap<String, Double>();
        }
        return additionalVersionWeights;
    }
<p>
The second version, and the percentage of traffic that's routed to it.
</p>

@return The second version, and the percentage of traffic that's routed to it.
aws-java-sdk-lambda/src/main/java/com/amazonaws/services/lambda/model/AliasRoutingConfiguration.java