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Assert Date
assertDate( x, length = NULL, na = FALSE, null = FALSE, unique = FALSE, named = FALSE, call = parent.frame(), msg = NULL )
x
Expression to check.
Required length.
Whether it can contain NA values.
Whether it can be NULL.
Whether it has to contain unique elements.
Whether it has to be named.
Call argument that will be passed to cli error message.
cli
Custom error message.