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Code Duplication    Length = 9-9 lines in 2 locations

src/eBayEnterprise/RetailOrderManagement/Payload/Order/OrderItem.php 2 locations

@@ 547-555 (lines=9) @@
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     *
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     * @return string
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     */
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    protected function serializeShippingProgram()
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    {
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        if (!is_null($this->getShippingProgram())) {
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            return "<ShippingProgram {$this->serializeOptionalAttribute('authToken', $this->xmlEncode($this->getShippingProgramAuthToken()))}>"
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                . $this->xmlEncode($this->getShippingProgram())
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                .'</ShippingProgram>';
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        }
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        return '';
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    }
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    /**
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     * Create a shipping method serialization if one is set for the payload.
@@ 562-570 (lines=9) @@
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     *
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     * @return string
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     */
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    protected function serializeShippingMethod()
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    {
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        if (!is_null($this->getShippingMethod())) {
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            return "<ShippingMethod {$this->serializeOptionalAttribute('displayText', $this->xmlEncode($this->getShippingMethodDisplayText()))}>"
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                . $this->xmlEncode($this->getShippingMethod())
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                .'</ShippingMethod>';
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        }
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        return '';
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    }
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    /**
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     * If given an IPayload, return the serialization of the payload. Otherwise,