code: private void reload() {
          try {
              if (!configFile.exists()) {
                  LOGGER.warn("Config file deleted " + configFile + ", keeping old config.");
                  return;
              }
              LOGGER.trace("Config reload triggered for " + configFile);
              if (parentSupplier != null) {
                  set(loadConfig(parentSupplier.get()));
              } else {
                  set(loadConfig(null));
              }
          } catch (ProvidenceConfigException e) {
              LOGGER.error("Exception when reloading " + configFile, e);
          }
      }
docs: Trigger reloading of the config file.