public Peering withCoreNetworkArn(String coreNetworkArn) {
        setCoreNetworkArn(coreNetworkArn);
        return this;
    }
<p>
The ARN of a core network.
</p>

@param coreNetworkArn
       The ARN of a core network.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-networkmanager/src/main/java/com/amazonaws/services/networkmanager/model/Peering.java