Retrieve domain-specific data from the active channel.
BPS_API void* bps_get_domain_data(int domain_id)
The domain ID provided by the bps_register_domain() function.
A service calls this function when it needs to retrieve the user data that was previously provided to the channel using the bps_set_domain_data() function.
When no data is associated with the domain_id argument, a NULL value is returned.
The user data that was associated with the active channel and the domain_id. If no data is found, a NULL value is returned.