@Override
   public Object getVariableValue(String nsURI, String prefix, String localName) throws UnresolvableException {
       final Object o = myMap.get(localName);
       if (o == null) throw new UnresolvableException("Unresolved variable: " + makePrefix(nsURI) + localName);
       return o;
   }
@Override
   public Object getVariableValue(String nsURI, String prefix, String localName)