# Package org.eclipse.core.runtime.dynamichelpers

Provides helpers to facilitate the authoring of dynamic plug-ins.

## Package Specification

This package specifies the API for tracking extensions life-cycle.

Interface Summary
IExtensionChangeHandler: Extension change handlers are notified of changes for a given extension point in the context of an extension tracker.
IExtensionTracker: An extension tracker keeps associations between extensions and their derived objects on an extension basis.
IFilter: A filter compares the given object to some pattern and returns `true` if the two match and `false` otherwise.

Class Summary
ExtensionTracker: Implementation of the IExtensionTracker.