||Thrown when an existing label is associated with piece of content (as opposed to be newly created).
||Thrown when a label is created and comes into existance.
||Thrown when a label itself is removed (as opposed to being disassociated from a piece of content).
||Represents a user viewing any of the label listview actions.
||Thrown when a label is disassociated from a piece of content (as opposed to itself being removed).