Return the specified registered ExtensionEntry instance.
the handle for the desired ExtensionEntry instance
an ExtensionEntry instance
Return ExtensionEntry instances for registered Extensions implementing the specified Extension Point.
the Extension Point to match
a map of extension handle to ExtensionEntry for all matching registered ExtensionEntry instances
Register a specified ExtensionEntry with a specified Extension handle.
a unique identifier under which to register the ExtensionEntry
the ExtensionEntry for the Extension to register
A registry of Extensions.