    001    package com.skype.api;
    002
    003    import com.skype.api.ContactGroup;
    004
    005
    006    public interface ContactGroupListener {
    007            /** This event gets called when there are changes to ContactGroup properties defined in ContactGroup.Property */
    008            public void onPropertyChange(ContactGroup object, ContactGroup.Property p, int value, String svalue);
    009            /** conversation added or removed from this group * @param conversation
    010             */
    011            public void onChangeConversation(ContactGroup object, Conversation conversation);
    012            /**
    013             * A contact has been added or removed to this ContactGroup.
    014             * NB! On rare occasions, the ContectRef argument to this callback can be NULL. You should always check whether the reference is valid, before accessing methods or properties.
    015             * @param contact
    016             */
    017            public void onChange(ContactGroup object, Contact contact);
    018    }