code: private static String genCodeForLiteralKeyAccess(String containerExpr, String key) {
      return genCodeForLiteralKeyAccess(containerExpr, key, NotFoundBehavior.throwException());
    }
docs: Generates the code for key access given a key literal, e.g. {@code .get('key')}.
  
  @param key the String literal value to be used as a key