code: public ProxyPolicyHandler getProxyPolicyHandler(String id) {
      return (id != null && this.proxyPolicyHandlers != null) ?
          (ProxyPolicyHandler)this.proxyPolicyHandlers.get(id) :
          null;
      }
docs: Retrieves a restricted proxy policy handler for a given policy id.
  
  @param id the Oid of the proxy policy to get the handler for.
  @return <code>ProxyPolicyHandler</code> the policy handler
  registered for the given id or null if none is
  registered.