public RDFHandlerWrapper(RDFHandler... rdfHandlers)
Creates a new RDFHandlerWrapper that wraps the supplied RDF handler(s). If more than one RDFHandler is
supplied for wrapping, the RDFHandlerWrapper forwards every method call to each of the supplied
handler, in the order in which the handlers are supplied.
rdfHandlers - One or more wrapped RDF handlers for this RDFHandlerWrapper, must not be null.
Handles a namespace declaration/definition. A namespace declaration associates a (short) prefix string
with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix,
are represented as empty strings.