Code Duplication    Length = 10-10 lines in 2 locations

Parser/Token/Token.php 2 locations

@@ 127-136 (lines=10) @@
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    /**
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     * @param Token|null|false $start
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     */
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    public function setStart($start = null)
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    {
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        $this->_end   = null;
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        $this->_start = $start;
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        if ($start instanceof Token) {
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            $this->_start->_length = null;
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            $start->_end = $this;
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        }
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    }
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    /**
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     * @return Token|null|false
@@ 149-158 (lines=10) @@
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    /**
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     * @param Token|null|false $end
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     */
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    public function setEnd($end = null)
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    {
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        $this->_start  = null;
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        $this->_end    = $end;
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        $this->_length = null;
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        if ($end instanceof Token) {
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            $end->_start = $this;
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        }
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    }
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    public function getLength()
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    {