public void setNumberOfAssociations(Integer numberOfAssociations) {
        this.numberOfAssociations = numberOfAssociations;
    }
<p>
The number of firewall policies that use this rule group.
</p>

@param numberOfAssociations
       The number of firewall policies that use this rule group.
aws-java-sdk-networkfirewall/src/main/java/com/amazonaws/services/networkfirewall/model/RuleGroupResponse.java