public java.util.List<String> getSecurityGroupIds() {
        if (securityGroupIds == null) {
            securityGroupIds = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return securityGroupIds;
    }
<p>
An array containing the instance security group IDs.
</p>

@return An array containing the instance security group IDs.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/Instance.java