public String getSourceSecurityGroupName() {
        return this.sourceSecurityGroupName;
    }
<p>
[Default VPC] The name of the source security group. You can't specify this parameter in combination with the
following parameters: the CIDR IP address range, the start of the port range, the IP protocol, and the end of the
port range. The source security group must be in the same VPC. To revoke a specific rule for an IP protocol and
port range, use a set of IP permissions instead.
</p>

@return [Default VPC] The name of the source security group. You can't specify this parameter in combination with
        the following parameters: the CIDR IP address range, the start of the port range, the IP protocol, and
        the end of the port range. The source security group must be in the same VPC. To revoke a specific rule
        for an IP protocol and port range, use a set of IP permissions instead.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/RevokeSecurityGroupIngressRequest.java