src/vs/workbench/browser/parts/editor/editorsObserver.ts/EditorsObserver/onDidChangeEditorPartOptions
class EditorsObserver:	private onDidChangeEditorPartOptions(event: IEditorPartOptionsChangeEvent): void {
		if (!equals(event.newPartOptions.limit, event.oldPartOptions.limit)) {
			const activeGroup = this.editorGroupsService.activeGroup;
			let exclude: IEditorIdentifier | undefined = undefined;
			if (activeGroup.activeEditor) {
				exclude = { editor: activeGroup.activeEditor, groupId: activeGroup.id };
			}

			this.ensureOpenedEditorsLimit(exclude);
		}
	}