public ContractFilter withNetwork(QueryNetwork network) {
        this.network = network.toString();
        return this;
    }
<p>
The blockchain network of the contract.
</p>

@param network
       The blockchain network of the contract.
@return Returns a reference to this object so that method calls can be chained together.
@see QueryNetwork
aws-java-sdk-managedblockchainquery/src/main/java/com/amazonaws/services/managedblockchainquery/model/ContractFilter.java