public java.util.List<String> getSecondaryAllocationIds() {
        if (secondaryAllocationIds == null) {
            secondaryAllocationIds = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return secondaryAllocationIds;
    }
<p>
Secondary EIP allocation IDs. For more information, see <a
href="https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html#nat-gateway-creating">Create a NAT
gateway</a> in the <i>Amazon VPC User Guide</i>.
</p>

@return Secondary EIP allocation IDs. For more information, see <a
        href="https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html#nat-gateway-creating">Create
        a NAT gateway</a> in the <i>Amazon VPC User Guide</i>.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateNatGatewayRequest.java