public static boolean isNegation(@NotNull GrExpression exp) {
    if (!(exp instanceof GrUnaryExpression prefixExp)) {
      return false;
    }
    final IElementType sign = prefixExp.getOperationTokenType();
    return GroovyTokenTypes.mBNOT.equals(sign);
  }
public static boolean isNegation(@NotNull GrExpression exp)