The method setHtml() does not exist on crocodicstudio\crudbooster\models\ColumnModel. It seems like you code against a sub-type of crocodicstudio\crudbooster\models\ColumnModel such as crocodicstudio\crudboost...ypes\custom\CustomModel.
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation