||Provides utility methods to cause the contents of AdWordsService messages
to be logged as Web Service operations are performed.
||An immutable object representing a single AdWords user.
||Represents the midnight-to-midnight time period as observed by the AdWords
server; this is the finest granularity for representing start and end dates
for things like Campaigns and Reports.
||Helper class used to track the time and operations spent on the server
for each call.