public synchronized String lookupContainer(String lookup) {
        if (aliasToContainerMap.containsKey(lookup)) {
            return aliasToContainerMap.get(lookup);
        }
        return imageToContainerMap.get(lookup);
    }
Lookup a container by name or alias from the tracked containers

@param lookup name or alias of the container to lookup
@return container id found or <code>null</code>
src/main/java/io/fabric8/maven/docker/service/ContainerTracker.java