code: def output_buffer_size(self, output_buffer_size_b):
          
  
          assert issubclass(output_buffer_size_b.__class__, int)
  
          return self.__push('output_buffer_size', output_buffer_size_b)
docs: output_buffer_size (nsqd 0.2.21+) the size in bytes of the buffer 
          nsqd will use when writing to this client.
  
          Valid range: 64 <= output_buffer_size <= configured_max (-1 disables 
          output buffering)
  
          --max-output-buffer-size (nsqd flag) controls the max
  
          Defaults to 16kb