# Package org.codehaus.groovy.runtime.m12n

- Class Summary
  Class | Description
  --- | ---
  ExtensionModule | An extension module is a class responsible for providing a list of `meta methods` to the Groovy compiler and runtime.
  ExtensionModuleRegistry | The extension method registry is responsible for collecting methods (or static methods) which are added to existing classes and may be called like regular methods.
  MetaInfExtensionModule | A `SimpleExtensionModule` implementation which reads extension classes metadata from META-INF.
  PropertiesModuleFactory | This is the base class for classes responsible for creating modules using properties.
  SimpleExtensionModule | An extension module which provides extension methods using a `DefaultGroovyMethods`-like implementation, that is to say using static methods defined in an "extension class".
  StandardPropertiesModuleFactory | This is the standard Groovy module factory.