code: public CorsConfigBuilder preflightResponseHeader(final CharSequence name, final Object... values) {
          if (values.length == 1) {
              preflightHeaders.put(name, new ConstantValueGenerator(values[0]));
          } else {
              preflightResponseHeader(name, Arrays.asList(values));
          }
          return this;
      }
docs: Returns HTTP response headers that should be added to a CORS preflight response.
  
  An intermediary like a load balancer might require that a CORS preflight request
  have certain headers set. This enables such headers to be added.
  
  @param name the name of the HTTP header.
  @param values the values for the HTTP header.
  @return {@link CorsConfigBuilder} to support method chaining.