## Not run:
# proto.file <- system.file( "proto", "addressbook.proto", package = "RProtoBuf" )
# Person <- P( "tutorial.Person", file = proto.file )
# ## End(Not run)
label(Person$id)
label(Person$email)
label(Person$phone)
label(Person$id, TRUE)
label(Person$email, TRUE)
label(Person$phone, TRUE)
LABEL_OPTIONAL
LABEL_REQUIRED
LABEL_REPEATED
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