public NetworkInfo withNetworkCards(NetworkCardInfo... networkCards) {
        if (this.networkCards == null) {
            setNetworkCards(new com.amazonaws.internal.SdkInternalList<NetworkCardInfo>(networkCards.length));
        }
        for (NetworkCardInfo ele : networkCards) {
            this.networkCards.add(ele);
        }
        return this;
    }
<p>
Describes the network cards for the instance type.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setNetworkCards(java.util.Collection)} or {@link #withNetworkCards(java.util.Collection)} if you want to
override the existing values.
</p>

@param networkCards
       Describes the network cards for the instance type.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/NetworkInfo.java