public Integer getNetworkCardIndex() {
        return this.networkCardIndex;
    }
<p>
The index of the network card. Some instance types support multiple network cards. The primary network interface
must be assigned to network card index 0. The default is network card index 0.
</p>

@return The index of the network card. Some instance types support multiple network cards. The primary network
        interface must be assigned to network card index 0. The default is network card index 0.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/AttachNetworkInterfaceRequest.java