## Not run:
# library(pbdZMQ, quietly = TRUE)
#
# ls(.pbd_env)
# rm(.pbd_env)
# .zmqopt_init()
# ls(.pbd_env)
#
# .pbd_env$ZMQ.SR$BLOCK
# pbd_opt(bytext = "ZMQ.SR$BLOCK = 0L")
# ## End(Not run)
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