public Boolean getDryRun() {
        return this.dryRun;
    }
<p>
Indicates whether you want Network Firewall to just check the validity of the request, rather than run the
request.
</p>
<p>
If set to <code>TRUE</code>, Network Firewall checks whether the request can run successfully, but doesn't
actually make the requested changes. The call returns the value that the request would return if you ran it with
dry run set to <code>FALSE</code>, but doesn't make additions or changes to your resources. This option allows
you to make sure that you have the required permissions to run the request and that your request parameters are
valid.
</p>
<p>
If set to <code>FALSE</code>, Network Firewall makes the requested changes to your resources.
</p>

@return Indicates whether you want Network Firewall to just check the validity of the request, rather than run
        the request. </p>
        <p>
        If set to <code>TRUE</code>, Network Firewall checks whether the request can run successfully, but
        doesn't actually make the requested changes. The call returns the value that the request would return if
        you ran it with dry run set to <code>FALSE</code>, but doesn't make additions or changes to your
        resources. This option allows you to make sure that you have the required permissions to run the request
        and that your request parameters are valid.
        </p>
        <p>
        If set to <code>FALSE</code>, Network Firewall makes the requested changes to your resources.
aws-java-sdk-networkfirewall/src/main/java/com/amazonaws/services/networkfirewall/model/UpdateFirewallPolicyRequest.java