Just a cent addition to what has been said:
Please, you don't EXPORT any subroutine from module that is written to be OO.
So, your usage should be:
use Params::Validate qw(validate :types);
And to use the module, then you use
If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me
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