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API > API/Plugins > API/Plugins/NiagaraEditor > API/Plugins/NiagaraEditor/Toolkits > API/Plugins/NiagaraEditor/Toolkits/SystemToolkitModes > API/Plugins/NiagaraEditor/Toolkits/SystemToolkitModes/FNiagaraSystemTo-
References
| Module | NiagaraEditor |
| Header | /Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/Toolkits/SystemToolkitModes/NiagaraSystemToolkitModeBase.h |
| Include | #include "Toolkits/SystemToolkitModes/NiagaraSystemToolkitModeBase.h" |
| Source | /Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Private/Toolkits/SystemToolkitModes/NiagaraSystemToolkitModeBase.cpp |
virtual void OnActiveDocumentChanged
&40;
TSharedPtr< class SDockTab > NewActiveTab
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