boolean isList() {
    return isList;
  }
Creates a new config option with fallback keys.

@param key The current key for that config option
@param clazz describes type of the ConfigOption, see description of the clazz field
@param description Description for that option
@param defaultValue The default value for this option
@param isList tells if the ConfigOption describes a list option, see description of the clazz
    field
amoro-common/src/main/java/org/apache/amoro/config/ConfigOption.java