CarrotChat v2.8.80.240429版本的 MD5 值为：fdf98761f01e715a89df24b85b0d206e

以下内容为反编译后的 PubSubNamespace.java 源代码，内容仅作参考

package org.jivesoftware.smackx.pubsub.packet;

import ak.im.module.Group;
import java.util.Locale;

public enum PubSubNamespace {
    BASIC(null),
    ERROR("errors"),
    EVENT("event"),
    OWNER(Group.OWNER);

    private final String fragment;
    private final String fullNamespace;

    PubSubNamespace(String str) {
        this.fragment = str;
        if (str != null) {
            this.fullNamespace = "http://jabber.org/protocol/pubsub#" + str;
            return;
        }
        this.fullNamespace = PubSub.NAMESPACE;
    }

    public static PubSubNamespace valueOfFromXmlns(String str) {
        if (str.lastIndexOf(35) != -1) {
            return valueOf(str.substring(str.lastIndexOf(35) + 1).toUpperCase(Locale.US));
        }
        return BASIC;
    }

    public String getFragment() {
        return this.fragment;
    }

    public String getXmlns() {
        return this.fullNamespace;
    }
}