docs: public static void assertThatEndMethodCheckFileExists(String uniqueFileName) throws IOException {
  		Enumeration<URL> resources = ClassLoader.getSystemResources(uniqueFileName);
  		if(!resources.hasMoreElements()) {
  			throw new AssertionError("End method check uniqueFileName named: " + uniqueFileName + " doesn't exist.\n" +
  					"Either you didn't use anywhere the annotation @EndMethodCheckFile(\"" + uniqueFileName + "\")\n" +
  					"or the annotation processor wasn't invoked by the compiler and you have to check it's configuration.\n" +
  					"For more about annotation processor configuration and possible issues see:\n" +
  					"https://github.com/c0stra/fluent-api-end-check");
  		}
  		URL url = resources.nextElement();
  		if(resources.hasMoreElements()) {
  			throw new IllegalArgumentException("Too many files with the same name: " + uniqueFileName + " found on class-path.\n" +
  					"Chosen end method check file name is not unique.\n" +
  					"Files found:\n" +
  					url + "\n" + resources.nextElement());
  		}
  	}