code: private Map<String, String> getCache(String projectName, String projectVersion) {
  		if (!caches.containsKey(getCacheKey(projectName, projectVersion))) {
  			caches.put(getCacheKey(projectName, projectVersion), loadOrCreateCache(projectName, projectVersion));
  		}
  
  		return caches.get(getCacheKey(projectName, projectVersion));
  	}
docs: Retrieve the cache for a project in a version
  
  @param projectName The project name
  @param projectVersion The project version
  @return The cache found. If none available, a new one is created