This tag turns tag debug mode on and off. When debug mode is on, tags will display HTML comments before and after they are executed to aid in debugging. Tags may also have custom behavior in debug mode. This tag uses an editable shared variable for debug mode (see com.plumtree.portaluiinfrastructure.tags.tasks.TagStateTasks.GetIsDebugMode for more details). This tag does not display the contents of the tag and should only be used as a singleton tag (i.e. <pt:core.debugmode/>), rather than as a tag with both an open and close tag.