Parameter passing mechanism: pass-by-reference
Story of Pass By Value and Pass By Reference in C# - CodeProject
Fragments and the Navigation Component
![Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org](https://www.drupal.org/files/issues/drupal_8.jpg "Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org")
Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
Reference and Value Types as Function Parameters Using Ref/Out Keywords
Story of Pass By Value and Pass By Reference in C# - CodeProject
Reading XML files in R. Learn to read nested and… | by Renu Khandelwal | Geek Culture | Medium
PHP: Only variables should be passed by reference – James' Desk
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Story Of Pass By Value And Pass By Reference In C#
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C++ Pointers and References
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Strict warning: Only variables should be passed by reference [#2892182] | Drupal.org
Code reference information | PhpStorm
Passing Reference Type Parameters in Java and C# | David Lim
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Code reference information | PhpStorm
Collecting Test Metadata - CircleCI
