public String getNatGatewayId() {
        return this.natGatewayId;
    }
<p>
[IPv4 traffic only] The ID of a NAT gateway.
</p>

@return [IPv4 traffic only] The ID of a NAT gateway.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ReplaceRouteRequest.java