private void addInnerComponents(CHAIN chain, Collection<COMPONENT> componentDefinitions) {
        for (COMPONENT innerComponent : componentDefinitions) {
            chain.addInnerComponent(innerComponent);
        }
    }
Base functionality for all chain builders (docprocChain, searchChain, provider, source)
@author Tony Vaagenes
config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/chains/DomChainBuilderBase.java