default Collection<ConfigCustomizer> forExtensionMethod(Class<?> extensionType, Method method) {
        return Collections.emptyList();
    }
Creates a collection of {@link ConfigCustomizer} instances for an extension type method.

@param extensionType The extension type
@param method        The method on the extension type
@return A {@link Collection} of {@link ConfigCustomizer} objects. Must not be null
core/src/main/java/org/jdbi/v3/core/extension/ConfigCustomizerFactory.java