public RevokeSecurityGroupEgressResult withUnknownIpPermissions(IpPermission... unknownIpPermissions) {
        if (this.unknownIpPermissions == null) {
            setUnknownIpPermissions(new com.amazonaws.internal.SdkInternalList<IpPermission>(unknownIpPermissions.length));
        }
        for (IpPermission ele : unknownIpPermissions) {
            this.unknownIpPermissions.add(ele);
        }
        return this;
    }
<p>
The outbound rules that were unknown to the service. In some cases, <code>unknownIpPermissionSet</code> might be
in a different format from the request parameter.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setUnknownIpPermissions(java.util.Collection)} or {@link #withUnknownIpPermissions(java.util.Collection)}
if you want to override the existing values.
</p>

@param unknownIpPermissions
       The outbound rules that were unknown to the service. In some cases, <code>unknownIpPermissionSet</code>
       might be in a different format from the request parameter.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/RevokeSecurityGroupEgressResult.java