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    # Loading either "mro" or "MRO::Compat" depending
    # on Perl version...
    ...
    # Load UNIVERSAL::DOES for Perl prior to 5.10.
    #
    use if $] < 5.010, 'UNIVERSAL::DOES';
    
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    # Loading either "mro" or "MRO::Compat" depending
    # on Perl version...
    ...
    BEGIN {
      require 'UNIVERSAL::DOES' if $] < 5.010;
    };