public void setEC2SecurityGroupId(String eC2SecurityGroupId) {
        this.eC2SecurityGroupId = eC2SecurityGroupId;
    }
<p>
Specifies the id of the EC2 security group.
</p>

@param eC2SecurityGroupId
       Specifies the id of the EC2 security group.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/EC2SecurityGroup.java