src/vs/workbench/contrib/customEditor/browser/customEditorInput.ts/CustomEditorInput/transfer
class CustomEditorInput:	protected override transfer(other: CustomEditorInput): CustomEditorInput | undefined {
		if (!super.transfer(other)) {
			return;
		}

		other._moveHandler = this._moveHandler;
		this._moveHandler = undefined;
		return other;
	}