code: public static boolean isSelfConfig(String configAbsoluteClassPath, String keyPrefix, IConfigKey key) {
          OneProperties configs = otherConfigs.get(configAbsoluteClassPath);
          if (configs == null) {
              addSelfConfigs(configAbsoluteClassPath, null);
              configs = otherConfigs.get(configAbsoluteClassPath);
              if (configs == null) {
                  return VOID_CONFIGS.isConfigTrue(keyPrefix, key);
              }
          }
          return configs.isConfigTrue(keyPrefix, key);
      }
docs: Get self config boolean value. Config key include prefix.
  Example:<br>
  If key.getKeyString() is "test", <br>
  isSelfConfig("/self.properties", "1.", key); will return "1.test" config value in "/self.properties".
  
  @param configAbsoluteClassPath config path.
  @param keyPrefix               config key prefix
  @param key                     config key in configAbsoluteClassPath config file
  @return true/false. If not add config file or not config in config file, return false.
  @see #addSelfConfigs(String, OneProperties)