def silence(temporary_level = Logger::ERROR)
      if silencer
        begin
          old_local_level            = local_level
          self.local_level           = temporary_level

          yield self
        ensure
          self.local_level = old_local_level
        end
      else
        yield self
      end
    end
def silence(temporary_level = Logger::ERROR)
      if silencer
        begin
          old_local_level            = local_level
          self.local_level           = temporary_level

          yield self
        ensure
          self.local_level = old_local_level
        end
      else
        yield self
      end
    end
Silences the logger for the duration of the block.