🚑 fix(simpleplugin) Fix SelectAttribute

issue #5536
parent 2ae92c04
......@@ -35,7 +35,7 @@ class SelectAttribute extends Attribute
/*! \brief Valid values which should be hidden from rendered input
*
* Used by SetAttribute to hide used values */
protected $hiddenChoices;
protected $hiddenChoices = [];
/*! \brief The constructor of SelectAttribute
*
......
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