code: public void addHeadersToResponse(HttpServletResponse theHttpResponse) {
  		String poweredByHeader = createPoweredByHeader();
  		if (isNotBlank(poweredByHeader)) {
  			theHttpResponse.addHeader(Constants.POWERED_BY_HEADER, poweredByHeader);
  		}
  	}
docs: This method is called prior to sending a response to incoming requests. It is used to add custom headers.
  <p>
  Use caution if overriding this method: it is recommended to call <code>super.addHeadersToResponse</code> to avoid
  inadvertently disabling functionality.
  </p>