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API > API/Plugins > API/Plugins/NiagaraEditor > API/Plugins/NiagaraEditor/SItemSelector > API/Plugins/NiagaraEditor/SItemSelector/FArguments
Description
An optional delegate called to get a stable key (supports GetTypeHash()) for a category. If set, this delegate is used to uniquely key categories to preserve selection and expansion state when refresh is called.
| Name | OnGetKeyForCategory |
| Type | function |
| Header File | /Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/Widgets/SItemSelector.h |
| Include Path | #include "Widgets/SItemSelector.h" |
WidgetArgsType & OnGetKeyForCategory
(
const FOnGetKeyForCategory & InDelegate
)