Ovid@OT-D1 ~
$ perl -e '$x=bless{}, "Foo";$x->import;print "Defined" if defined &Foo::import'

Ovid@OT-D1 ~
$ perl -e 'print "Defined" if defined &UNIVERSAL::isa'
Defined

##</code><code>##

$ perl -e '$x=bless{}, "Foo";$x->import;$x->no_way'
Can't locate object method "no_way" via package "Foo" (perhaps you forgot to load "Foo"?) at -e line 1.