de.alpharogroup.design.pattern.observer
de.alpharogroup.design.pattern.observer.api
de.alpharogroup.design.pattern.observer.chat
de.alpharogroup.design.pattern.observer.chat.listener
de.alpharogroup.design.pattern.observer.event
de.alpharogroup.design.pattern.observer.exception
de.alpharogroup.design.pattern.observer.exception.handlers
