||This class represents an extension and could be implemented by callers.
||This class represents a navigation history for a XWalkView instance.
||This class represents a navigation item and is managed in XWalkNavigationHistory.
||This class represents the preferences and could be set by callers.
||This class notifies the embedder resource events/callbacks.
||This class notifies the embedder UI events/callbacks.
XWalkView represents an Android view for web apps/pages.