code: public static void put(String key, RibbonColumnCreator ribbonColumnCreator) {
  		if (null != key && null != ribbonColumnCreator) {
  			REGISTRY.put(key, ribbonColumnCreator);
  		}
  	}
docs: Add another key to the registry. This will overwrite the previous value.
  
  @param key
  Unique key for the action within this registry.
  @param ribbonColumnCreator
  Implementation of the {@link RibbonColumnCreator} interface to link the correct type of ribbon column
  widget to the key.