src/vs/workbench/contrib/codeEditor/browser/toggleColumnSelection.ts/ToggleColumnSelectionAction/_getCodeEditor
class ToggleColumnSelectionAction:	private _getCodeEditor(codeEditorService: ICodeEditorService): ICodeEditor | null {
		const codeEditor = codeEditorService.getFocusedCodeEditor();
		if (codeEditor) {
			return codeEditor;
		}
		return codeEditorService.getActiveCodeEditor();
	}