#!/usr/bin/env perl
use 5.034;

use Mojo::DOM;

my $xml_src = do {
  local $/;
  <DATA>;
};

my $dom = Mojo::DOM->new->xml(1);
$dom->parse( $xml_src );

my @targets = (
               qq{com\\.cloudbees\\.hudson\\.plugins\\.folder\\.properties\\.AuthorizationMatrixProperty},
               qq{\Qcom.cloudbees.hudson.plugins.folder.properties.AuthorizationMatrixProperty}, );

for my $tgt (@targets) {
  say qq{tgt: $tgt};
  say $dom->at( $tgt )->all_text;
}

exit 0;

__END__
<?xml version="1.0" encoding="UTF-8"?>
<foo>
  <com.cloudbees.hudson.plugins.folder.properties.AuthorizationMatrixProperty>
    <bar>Test text</bar>
  </com.cloudbees.hudson.plugins.folder.properties.AuthorizationMatrixProperty>
</foo>