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  1. or download this
    
sub pass_var {
...
print "after: hash: $hash->{'key'}\n";

print "hashref is: $hash\n";
  2. or download this
    foo: 1 bar: 2
changed: foo: c1 bar: c2
...
hashref is: HASH(0x80f86e0)
after: hash: c1
hashref is: HASH(0x80f86e0)