The following methods can be safely whitelisted and are very useful for writing compact code:

• method groovy.lang.NumberRange by int
• method groovy.lang.NumberRange getStepSize
• method groovy.lang.Range getFrom
• method groovy.lang.Range getTo
• method groovy.lang.Range step int
• method groovy.lang.Range step int groovy.lang.Closure
• method java.util.Map containsValue java.lang.Object
• staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods getAt java.lang.Object[] java.util.Collection
• staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods minus java.util.List removeAt int
• staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods minus java.util.List removeLast