Send a message to the topic associated with the LBM source

Caution: It is not recommended to call this method from a context thread callback.
Possible OR'd set of flag value include:
SRC_NONBLOCK, SRC_BLOCK, MSG_START_BATCH, MSG_END_BATCH, MSG_COMPLETE_BATCH, and MSG_FLUSH
Exception | Condition |
---|---|
Invalid argument or unexpected operational behavior has been encountered by unmanaged LBM C layer function. |