/** The key of the configuration. e.g. gidNumber */
    String LDAP_ATTR_GID_NUMBER = "ldap.attr.gidNumber";

    /** The key of the configuration. e.g. homeDirectory */
    String LDAP_ATTR_HOME_DIRECTORY = "ldap.attr.homeDirectory";

    /** The key of the configuration. e.g. https://repo.maven.apache.org/maven2/org/codelibs/fess/,https://fess.codelibs.org/plugin/artifacts.yaml */