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  1. or download this
    __START_OF_COMMON_LIB_FILE__
    package Class1;
    ...
    
    1;
    __END_OF_COMMON_LIB_FILE__
    
  2. or download this
    use lib 'C:\tmp';
    use CommonLib;
    
    ...
    
    $class1_obj->method_1;
    $class2_obj->method_2;
    
  3. or download this
    D:\tmp>tmp.pl
    I'm method 1!
    I'm method 2!
    
    D:\tmp>
    
  4. or download this
    use CommonLib;
    
    my $class1_obj = Class1->new;
    ...
    
    $class1_obj->method_2;
    $class2_obj->method_1;
    
  5. or download this
    D:\tmp>tmp.pl
    Can't locate object method "method_2" via package "Class1" at D:\tmp\t
    +mp.pl line 10.
    
    D:\tmp>
    
  6. or download this
    package Class1;
    package Class2;
    
    sub foo {
    }