Unfortunately not a MCE expert, just a big promoter, but generally speaking use X is transalted with require X; import X LIST eventually inside BEGIN to mimicry exatly use

Consider, in StrawberryPerl:

C>perl -we "require MCE::Map; MCE::Map-> init(user_begin => sub {},use
+r_end => sub {}); my @a = MCE::Map->run( sub { $_ }, [ 0 .. 9 ]);"
# CTRL-C
Terminating on signal SIGINT(2)
MCE::shutdown: method is not allowed while running at -e line 0.
END failed--call queue aborted, <__ANONIO__> line 80992.

                             # LOOK HERE    #
C>perl -we "require MCE::Map; import MCE::Map; MCE::Map-> init(user_be
+gin => sub {},user_end => sub {}); my @a = MCE::Map->run( sub { $_ },
+ [ 0 .. 9 ]);"

C>
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