public void setCidrBlock(String cidrBlock) {
        this.cidrBlock = cidrBlock;
    }
<p>
The primary IPv4 CIDR block for the VPC.
</p>

@param cidrBlock
       The primary IPv4 CIDR block for the VPC.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/Vpc.java