This interface permits a DOM implementer to supply one or more implementations,
based upon requested features and versions, as specified in DOM Features.
Each implemented DOMImplementationSource object is listed in the binding-specific
list of available sources so that its DOMImplementation objects are made available.
This interface permits a DOM implementer to supply one or more implementations, based upon requested features and versions, as specified in DOM Features. Each implemented DOMImplementationSource object is listed in the binding-specific list of available sources so that its DOMImplementation objects are made available.