code: def doFlush(self, cname, flushExpression, flushType):
          
          return self.client.service.doFlush(
              cname, flushExpression, flushType)
docs: doFlush method enables specific content to be "flushed" from the
          cache servers.
  
          * Note: The flush API is limited to 1,000 flush invocations per hour
          (each flush invocation may include several objects). *