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Valid device names are strings up to 25 characters long and can include letters, numbers, _, and -.
is.valid_device(device)
one or more device names (e.g., "phone", c("phone", "tablet"))
Logical value(s) indicating whether the corresponding device name is valid (TRUE) or not (FALSE)
TRUE
FALSE
# NOT RUN { is.valid_device("my_phone") # }
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