After looking around, trying to figure out what I want to do, I decided to use the 'walk like a duck' approach and use can. However, the same problem occured! So I use this solution together with can. Thanks for this one!

use Scalar::Util qw(blessed);

if ( blessed( $value ) and $value->can( 'parent' ) ) {
   #
}

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    -Bryan

In reply to Re^2: isa() on any scalar by mrborisguy
in thread isa() on any scalar by mrborisguy

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