Defines the order in which the header and footer HTML snippets will be
wrapped around the served creative.
INNER snippets will be wrapped
first, followed by
NO_PREFERENCE and finally
OUTER. If the
creative needs to be wrapped with more than one snippet with the same
CreativeWrapperOrdering, then the order is unspecified.
||Wrapping occurs after INNER but before OUTER|
||Wrapping occurs as early as possible.|
||Wrapping occurs after both NO_PREFERENCE and INNER|