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# use Module @LIST is really:

...
  require Module; 
  Module->import( @LIST );
}

# Bozo.pm

sub go_bozo { return "BOZO!\n" }

1;

# script.pl

...

package main;
print Burble::go_bozo();

# script.pl

...
package main;
print Burble::go_bozo(); # OK
print Wibble::go_gozo(): # ERROR - doesn't exist

# Bozo.pm
package Bozo;
...
sub go_bozo { return "BOZO!\n" }

1;

# script.pl

...
print Bozo::go_bozo();   # OK
print Burble::go_bozo(); # ERROR - doesn't exist
print go_bozo();         # ERROR - main::go_bozo() doesn't exist eithe
+r

# Bozo.pm
package Bozo;
...
sub go_bozo { return "BOZO!\n" }

1;

# Bozo.pm
package Bozo;
...
sub go_bozo { return "BOZO!\n" }

1;

# script.pl

...

print Bozo::go_bozo();   # OK
print go_bozo();         # ERROR - main::go_bozo() still doesn't exist

# Bozo.pm
package Bozo;
...
sub go_bozo { return "BOZO!\n" }

1;

# script.pl

...
print Burble::go_bozo(); # OK
print Wibble::go_bozo(): # OK
print go_bozo();         # OK