Call to Magento\ImportExport\Model\Source\Import\Behavior\Custom with constructor arguments

[dmanners]

Preconditions (*)

1. 2.3-develop
2. phpstan installed

Steps to reproduce (*)

1. ./vendor/bin/phpstan analyse -l 0 app/code/Magento/ImportExport/Test/Unit/Model/Source/Import/Behavior/CustomTest.php

Expected result (*)

1. No errors

Actual result (*)

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  Line   Test/Unit/Model/Source/Import/Behavior/CustomTest.php
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  35     Class Magento\ImportExport\Model\Source\Import\Behavior\Custom does not have a constructor and must be instantiated without any parameters.
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