static [EVisibility](API\Runtime\SlateCore\Layout\EVisibility) ShouldShowExpression ( [TObjectPtr](API\Runtime\Core\Delegates\TObjectPtr)< [UDEditorParameterValue](API\Editor\UnrealEd\MaterialEditor\UDEditorParameterValue) > Parameter, [UMaterialEditorInstanceConstant](API\Editor\UnrealEd\MaterialEditor\UMaterialEditorInstanceConstant) * MaterialEditorInstance, FGetShowHiddenParameters ShowHiddenDelegate )