$ perl -e'STDOUT->foo'
Can't locate object method "foo" via package "IO::File" at -e line 1.

##</code><code>##

$ perl -e'use IO::File; IO::File::say( *STDOUT, "ok" )'
Undefined subroutine &IO::File::say called at -e line 1.

$ perl -e'use IO::File; IO::Handle::say( *STDOUT, "ok" )'
ok

$ perl -e'STDOUT->say( "ok" )'
ok