# Package groovy.lang

- Interface Summary
  Interface | Description
  --- | ---
  GroovyObject | GDK enhancements for GroovyObject.
  MetaClass | GDK enhancements for MetaClass.
  Range | GDK enhancements for Range.

- Class Summary
  Class | Description
  --- | ---
  Closure | GDK enhancements for Closure.
  GString | GDK enhancements for GString.
  ListWithDefault | GDK enhancements for ListWithDefault.