Add or query subject of message.
subject(
msg,
subject = NULL,
prefix = NA,
suffix = NA,
interpolate = TRUE,
.open = "{{",
.close = "}}",
.envir = NULL
)
A message object.
A subject for the message.
A subject prefix.
A subject suffix.
Whether or not to interpolate into input using glue.
The opening delimiter.
The closing delimiter.
Environment used for glue
interpolation. Defaults to parent.frame()
.
A message object or the subject of the message object (if subject
is NULL
).
The prefix
and suffix
can be used to add extra
subject
abbreviations.