def silence(temporary_level = ERROR)
      if silencer
        begin
          old_logger_level, self.level = level, temporary_level
          yield self
        ensure
          self.level = old_logger_level
        end
      else
        yield self
      end
    end
def silence(temporary_level = ERROR)
      if silencer
        begin
          old_logger_level, self.level = level, temporary_level
          yield self
        ensure
          self.level = old_logger_level
        end
      else
        yield self
      end
    end
Silences the logger for the duration of the block.