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use strict;
sub This::Does::Not::Fail { };
...
# encountered, you'll have a subroutine with this name
# all ready to go.
It::Bothers::Me::That::This::Works (); # wassup with THAT?!

$obj->method;   # Either $obj class' method will exist or
                # AUTOLOAD had better take care of it later.
$a=foo Bar;     # Bar will have a foo()!  Or AUTOLOAD...etc.
&foo;           # Again, you've promised it will exist...