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Only variables should be passed by reference [#1614450] | Drupal.org
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Strict warning: Only variables should be passed by reference [#2149287] | Drupal.org
PHP: Only variables should be passed by reference - PHP Error - Mazz i Torch - The latest global technology multi-platform entertainment media
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Drupal 9 Module Development - Third Edition | Packt
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The reference view cannot be found' message is shown when the view exists and can be configured normally [#3062155] | Drupal.org
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The reference view cannot be found' message is shown when the view exists and can be configured normally [#3062155] | Drupal.org
Ajax Testing in Drupal 8 | Phase2 Technology
How to Use Entity Reference Views in Drupal 8
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Filter Entity Reference View with dynamic arguments from Reference Field - Stack Overflow
Drupal 8 core and Symfony components | ADCI Solutions
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Notice: Only variables should be passed by reference [#2936867] | Drupal.org
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
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Only variables should be passed by reference [#2973834] | Drupal.org
Drupal 8 Services, Dependency Injection, and Decoupling Your Code | FFW
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Only variables should be passed by reference auto_entitylabel_set_title() [#2763941] | Drupal.org
PHP7: "Notice: Only variables should be passed by reference" - WPML
The List of the 10 Most Common Mistakes That PHP Developers Make | Toptal
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
Drupal migrations reference: List of configuration options for source plugins | Understand Drupal
Varnish for Drupal 8 | Dropsolid.io
