use Module LIST is equivalent to:
BEGIN { require Module; import Module LIST; }
Nit: it's actually equivalent to:
BEGIN { require Module; Module->import( LIST ); }
use always performs a method call, where the indirect invocation form you had sometimes does not perform a method call. (If you want to be very specific, it's probably closer to Module::->import( LIST ), but you have to read the code to Perl_utilize() in C to make sure of that.)
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