code: public synchronized boolean canBeConfigured(HttpContext httpContext) {
  		return canBeConfigured(httpContext, servletModels)
  				&& canBeConfigured(httpContext, filterModels.values())
  				&& canBeConfigured(httpContext, eventListenerModels.values())
  				&& canBeConfigured(httpContext, errorPageModels.values())
  				&& canBeConfigured(httpContext, loginConfigModels.values());
  	}
docs: Returns true if the context can still be configured. This is possible
  before any web components (servlets / filters / listeners / error pages)
  are registered. TODO verify what happen once the web elements are
  registered and then unregistered. Can still be configured?
  
  @param httpContext created by the service of this model
  @return true, if context can be configured false otherwise