Closed the AMQP session, i.e. allows the End frame to be emitted.
If the closure is being locally initiated, the {@link #closeHandler(Handler)} may be used to handle the peer
sending their End frame. When use of the session is complete, i.e it is locally and
remotely closed, {@link #free()} must be called to ensure related resources can be tidied up.
Closed the AMQP session, i.e. allows the End frame to be emitted.
If the closure is being locally initiated, the {@link #closeHandler(Handler)} may be used to handle the peer sending their End frame. When use of the session is complete, i.e it is locally and remotely closed, {@link #free()} must be called to ensure related resources can be tidied up.
@return the session