Interface Module

libs/guice/src/main/java/org/elasticsearch/common/inject/Module.java:33–43

A module contributes configuration information, typically interface bindings, which will be used to create an Injector. A Guice-based application is ultimately composed of little more than a set of Modules and some bootstrapping code. Your Module classes can use a more streamline

 * bindings.
 */
public interface Module {

    /**
     * Contributes bindings and other configurations for this module to {@code binder}.
     * <p>
     * <strong>Do not invoke this method directly</strong> to install submodules. Instead use
     * {@link Binder#install(Module)}, which ensures that {@link Provides provider methods} are
     * discovered.
     */
    void configure(Binder binder);
}