A logical value. If FALSE, NA values
cause an error; otherwise they do not. Like na.rm in many
stats package functions, except that the position of the failing
values does not change.
severity
How severe should the consequences of the assertion be?
Either "stop", "warning", "message", or "none".
Value
is_us_social_security_number returns TRUE if the input
string contains a valid US Social Security Number. The assert_* functions
return nothing but throw an error when the is_* function returns
FALSE.