docs: public static SymbolToken newSymbolToken(SymbolTable symtab,
                                               String text)
      {
          // TODO amzn/ion-java/issues/21 symtab should not be null
          text.getClass(); // quick null check
  
          SymbolToken tok = (symtab == null ? null : symtab.find(text));
          if (tok == null)
          {
              tok = new SymbolTokenImpl(text, UNKNOWN_SYMBOL_ID);
          }
          return tok;
      }