code: public static <T extends AbstractConfiguration> T findConfiguration(Class<?> klass) {
  		// Look for static methods first
  		List<Method> methods = findStaticMethodsAnnotatedWith(klass, TestServerConfiguration.class);
  		List<Field> fields = findStaticFieldsAnnotatedWith(klass, TestServerConfiguration.class);
  		int nbOfConfigurations = methods.size() + fields.size();
  
  		if (nbOfConfigurations > 1) {
  			failBecauseOfDuplicateConfiguration(klass, methods, fields);
  		}
  
  		if (!methods.isEmpty()) {
  			return invoke(methods.get(0));
  		}
  
  		// Then, look for static field
  		if (!fields.isEmpty()) {
  			return getter(fields.get(0));
  		}
  
  		return null;
  	}
docs: Find configuration object on static field / method on
  running class. Configuration is read from static method or static field
  annotated with {@link com.github.mjeanroy.junit.servers.annotations.TestServerConfiguration} annotation.
  
  @param klass Class to inspect.
  @param <T> Type of configuration.
  @return Configuration.