def session_id(self):
return lib.lsl_get_session_id(self.obj).decode('<STR_LIT:utf-8>')<EOL>
Session ID for the given stream.

        The session id is an optional human-assigned identifier of the 
        recording session. While it is rarely used, it can be used to prevent 
        concurrent recording activitites on the same sub-network (e.g., in 
        multiple experiment areas) from seeing each other's streams 
        (can be assigned in a configuration file read by liblsl, see also 
        Network Connectivity in the LSL wiki).