src/com/google/javascript/jscomp/NodeUtil.java
/**
   * Converts an operator's token value (see {@link Token}) to a string representation or fails.
   *
   * @param operator the operator's token value to convert
   * @return the string representation
   * @throws Error if the token value is not an operator
   */
Converts an operator's token value  to a string representation or fails.
@param operator the operator's token value to convert
@return the string representation
@throws Error if the token value is not an operator
Converts an operator ' s token value to a string representation or fails . @param operator the operator ' s token value to convert @return the string representation @throws Error if the token value is not an operator
static String opToStrNoFail(Token operator) {
    String res = opToStr(operator);
    if (res == null) {
      throw new Error("Unknown op " + operator);
    }
    return res;
  }
static String opToStrNoFail ( Token operator ) { String res = opToStr ( operator ) ; if ( res == null ) { throw new Error ( "Unknown op " + operator ) ; } return res ; }
Converts an operator's token value (see {@link Token}) to a string representation or fails.
Converts an operator ' s token value ( see { @link Token } ) to a string representation or fails .