Code Duplication    Length = 4-4 lines in 2 locations

system/vendor/swift/Swift/Message.php 2 locations

@@ 739-742 (lines=4) @@
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          $this->getReference("parent", "mixed")->removeChild("_related");
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          unset($this->references["mixed"]["_related"]);
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        }
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        if (array_keys($this->references["mixed"]) == array("_related"))
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        {
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          $this->moveBranchOut($this->references["related"], "related", "mixed", "_related");
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        }
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        break;
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      case (!empty($this->references["mixed"]) && !empty($this->references["related"])):
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        if (array_keys($this->references["mixed"]) == array("_related"))
@@ 745-748 (lines=4) @@
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        }
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        break;
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      case (!empty($this->references["mixed"]) && !empty($this->references["related"])):
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        if (array_keys($this->references["mixed"]) == array("_related"))
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        {
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          $this->moveBranchOut($this->references["related"], "related", "mixed", "_related");
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        }
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        if (isset($this->references["related"]["_alternative"]))
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        {
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          $this->detach("_alternative");