code: def shouldReportBuild(self, builder, buildnum):
          
          for w, b, n in self.reported_builds:
              if b == builder and n == buildnum:
                  return False
          self.reported_builds.append([util.now(), builder, buildnum])
  
          # clean the reported builds
          horizon = util.now() - 60
          while self.reported_builds and self.reported_builds[0][0] < horizon:
              self.reported_builds.pop(0)
  
          # and return True, since this is a new one
          return True
docs: Returns True if this build should be reported for this contact
          (eliminating duplicates), and also records the report for later