| Name | Description | Type | Package | Framework |
| ClosureUtils | Handy methods when working with the Closure expressions. | Class | org.codehaus.groovy.ast.tools | Groovy |
| GeneralUtils | Handy methods when working with the Groovy ASTAuthor:Guillaume Laforge, Paul King, Andre Steingress, Graeme Rocher | Class | org.codehaus.groovy.ast.tools | Groovy |
| GenericsUtils | Utility methods to deal with generic types. | Class | org.codehaus.groovy.ast.tools | Groovy |
| WideningCategories | This class provides helper methods to determine the type from a widening operation for example for a plus operation. | Class | org.codehaus.groovy.ast.tools | Groovy |
| WideningCategories .LowestUpperBoundClassNode | This ClassNode specialization is used when the lowest upper bound of two types cannot be represented by an existing type. | Class | org.codehaus.groovy.ast.tools.WideningCategories | Groovy |