code: @Override
  	public void addProtocolHandlerCustomizers(
  			TomcatProtocolHandlerCustomizer<?>... tomcatProtocolHandlerCustomizers) {
  		Assert.notNull(tomcatProtocolHandlerCustomizers,
  				"TomcatProtocolHandlerCustomizers must not be null");
  		this.tomcatProtocolHandlerCustomizers
  				.addAll(Arrays.asList(tomcatProtocolHandlerCustomizers));
  	}
docs: Add {@link TomcatProtocolHandlerCustomizer}s that should be added to the Tomcat
  {@link Connector}.
  @param tomcatProtocolHandlerCustomizers the customizers to add
  @since 2.2.0