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API > API/Plugins > API/Plugins/NiagaraEditor > API/Plugins/NiagaraEditor/ViewModels > API/Plugins/NiagaraEditor/ViewModels/UNiagaraSystemEditorDocumentsVie-
References
| Module | NiagaraEditor |
| Header | /Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemEditorDocumentsViewModel.h |
| Include | #include "ViewModels/NiagaraSystemEditorDocumentsViewModel.h" |
FScriptToolkitsActiveDocumentChanged & OnActiveDocumentChanged&40;&41;