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API > API/Editor > API/Editor/UnrealEd > API/Editor/UnrealEd/UEditorWorldExtensionCollection > API/Editor/UnrealEd/UEditorWorldExtensionCollection/AddExtension
References
| Module | UnrealEd |
| Header | /Engine/Source/Editor/UnrealEd/Public/EditorWorldExtension.h |
| Include | #include "EditorWorldExtension.h" |
| Source | /Engine/Source/Editor/UnrealEd/Private/EditorWorldExtension.cpp |
UEditorWorldExtension &42; AddExtension
&40;
TSubclassOf< UEditorWorldExtension > EditorExtensionClass
&41;
Remarks
Checks if the passed extension already exists and creates one if it doesn't.
Parameters
| Name | Description |
|---|---|
| EditorExtensionClass | the subclass of an extension to create if necessary and add. |