public static Boolean getBoolean(String key, Boolean defaultValue) {
        String value = get().get(key);
        if (value != null) {
            return Boolean.valueOf(value.trim());
        }
        return defaultValue;
    }
Gets value mapped to key, returning defaultValue if unmapped.

@param  key          to be found
@param  defaultValue returned if key is unmapped
@return              value associated with key
inlong-sort-standalone/sort-standalone-common/src/main/java/org/apache/inlong/sort/standalone/config/holder/CommonPropertiesHolder.java