core/src/main/java/org/trimou/engine/config/ConfigurationExtensions.java
public static void registerHelpers(ConfigurationExtensionBuilder builder, Map<String, Helper> helpers) {
        Checker.checkArgumentsNotNull(builder, helpers);
        for (Entry<String, Helper> entry : helpers.entrySet()) {
            registerHelper(builder, entry.getKey(), entry.getValue());
        }
    }
public static void registerHelpers(ConfigurationExtensionBuilder builder, Map<String, Helper> helpers) {
        Checker.checkArgumentsNotNull(builder, helpers);
        for (Entry<String, Helper> entry : helpers.entrySet()) {
            registerHelper(builder, entry.getKey(), entry.getValue());
        }
    }
Register helper and do nothing if a helper with the same name is already registered.

@param builder
@param helpers