Data::Transpose::Validator::Set - Validate a string inside a set of values
Constructor to set the list in which the value to be validated must be present.
Returns a true value if the value (or the values) passed are all present in the set.
Multiple values validate only if the
multiple option is set in the constructor.
It also accept an arrayref as single argument,
multiple option is set.
Accessor to the
Accessor to the list of values, as an hash.