code: public static boolean hasOperator (@Nullable final IJSExpression aExpr)
    {
      return aExpr instanceof JSOpUnary || aExpr instanceof JSOpBinary || aExpr instanceof JSOpTernary;
    }
docs: Determine whether the top level of an expression involves an operator.
  
  @param aExpr
  Expression to check
  @return <code>true</code> if it involves an operator