public String getString(ConfigOption<String> configOption, String overrideDefault) {
    return getOptional(configOption).orElse(overrideDefault);
  }
Returns the value associated with the given config option as a string. If no value is mapped
under any key of the option, it returns the specified default instead of the option's default
value.

@param configOption The configuration option
@return the (default) value associated with the given config option
amoro-common/src/main/java/org/apache/amoro/config/Configurations.java