Enumeration members
kTIMGroupMemberRoleFlag_Admin
kTIMGroupMemberRoleFlag_Admin: = 2
kTIMGroupMemberRoleFlag_All
kTIMGroupMemberRoleFlag_All: = 0
kTIMGroupMemberRoleFlag_Member
kTIMGroupMemberRoleFlag_Member: = 4
kTIMGroupMemberRoleFlag_Owner
kTIMGroupMemberRoleFlag_Owner: = 1
群组成员角色标识