public void setCidrBlockAssociationSet(java.util.Collection<CidrBlockAssociation> cidrBlockAssociationSet) {
        if (cidrBlockAssociationSet == null) {
            this.cidrBlockAssociationSet = null;
            return;
        }

        this.cidrBlockAssociationSet = new java.util.ArrayList<CidrBlockAssociation>(cidrBlockAssociationSet);
    }
<p>
Information about the IPv4 CIDR blocks associated with the VPC.
</p>

@param cidrBlockAssociationSet
       Information about the IPv4 CIDR blocks associated with the VPC.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/AwsEc2VpcDetails.java