成员的完整列表，这些成员属于 NIMQChatRemoveChannelCategoryRoleParam,包括所有继承而来的类成员

category_id	NIMQChatRemoveChannelCategoryRoleParam
cb	NIMQChatRemoveChannelCategoryRoleParam
role_id	NIMQChatRemoveChannelCategoryRoleParam
server_id	NIMQChatRemoveChannelCategoryRoleParam
user_data	NIMQChatRemoveChannelCategoryRoleParam