@Override
    public Token createToken(int tokenType, String text) {
      if (tokenType == HiveParser.TOK_SETCOLREF) {
        // ParseUtils.processSetColsNode() can change type of TOK_SETCOLREF nodes later
        return new CommonToken(tokenType, text);
      } else {
        return new ImmutableCommonToken(tokenType, text);
      }
    }
Creates an ASTNode for the given token. The ASTNode is a wrapper around
antlr's CommonTree class that implements the Node interface.

@param payload
         The token.
@return Object (which is actually an ASTNode) for the token.
parser/src/java/org/apache/hadoop/hive/ql/parse/ParseDriver.java