code: def set_buffer(library, session, mask, size):
      
      return library.viSetBuf(session, mask, size)
docs: Sets the size for the formatted I/O and/or low-level I/O communication buffer(s).
  
      Corresponds to viSetBuf function of the VISA library.
  
      :param library: the visa library wrapped by ctypes.
      :param session: Unique logical identifier to a session.
      :param mask: Specifies the type of buffer. (Constants.READ_BUF, .WRITE_BUF, .IO_IN_BUF, .IO_OUT_BUF)
      :param size: The size to be set for the specified buffer(s).
      :return: return value of the library call.
      :rtype: :class:`pyvisa.constants.StatusCode`