code: public RegistryEntry getEntry(String searchType) {
  		for (Map.Entry<Class, RegistryEntry> entry : resources.entrySet()) {
  			String type = getResourceType(entry.getKey());
  			if (type == null) {
  				return null;
  			}
  			if (type.equals(searchType)) {
  				return entry.getValue();
  			}
  		}
  		return null;
  	}
docs: Searches the registry for a resource identified by a JSON API resource
  type. If a resource cannot be found, <i>null</i> is returned.
  
  @param searchType
  resource type
  @return registry entry or <i>null</i>