code: @Override
      public boolean hasObjectWithPrefix(JavaColonNamespace namespace, String name) throws NamingException {
          final boolean isTraceOn = TraceComponent.isAnyTracingEnabled();
          if (isTraceOn && tc.isEntryEnabled())
              Tr.entry(tc, "hasObjectWithPrefix (" + namespace + ", " + name + ")");
  
          if (name == null) {
              throw new InvalidNameException();
          }
  
          boolean result = false;
          // This helper only provides support for java:comp/env
          if (namespace == JavaColonNamespace.COMP && name.isEmpty()) {
              result = true;
          }
  
          if (isTraceOn && tc.isEntryEnabled())
              Tr.exit(tc, "hasObjectWithPrefix", result);
          return result;
      }
docs: {@inheritDoc}
  
  @throws NameException