code: public List<String> getKeys() {
          CodeGeneratorLoggerFactory.getLogger().debug(String.format("Reading keys from data file [%s]", fileName));
          List<String> keys = reader.getAllKeys();
          checkForDuplicateKeys(keys);
          return keys;
      }
docs: Get the keys defined in the Page meta data <br>
  <b>Note:</b> Currently, only yaml files are supported.
  
  @return A {@link List} of {@link String} representing the keys found in the meta data. Will return an empty
  {@link List} on error or if no keys exist.