We would like to whitelist the following signatures:

• staticMethod groovy.xml.XmlUtil escapeXml java.lang.String
• new java.util.concurrent.LinkedBlockingQueue
• method java.util.concurrent.BlockingQueue poll long java.util.concurrent.TimeUnit
• staticField java.util.concurrent.TimeUnit MILLISECONDS
• staticField java.util.concurrent.TimeUnit SECONDS
• new java.util.TreeMap

All of these signatures are utility classes and hence, it should be safe to whitelist them.