The method checkAccess() does not exist on roaresearch\yii2\formgenerator\models\FieldRule. Since you implemented __call, consider adding a @method annotation.
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation
The property created_by does not exist on roaresearch\yii2\formgen...FieldRulePropertySearch. Since you implemented __get, consider adding a @property annotation.