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

channelId	cn_rongcloud_im_unity.RCIMMessage
conversationType	cn_rongcloud_im_unity.RCIMMessage
direction	cn_rongcloud_im_unity.RCIMMessage
expansion	cn_rongcloud_im_unity.RCIMMessage
extra	cn_rongcloud_im_unity.RCIMMessage
groupReadReceiptInfo	cn_rongcloud_im_unity.RCIMMessage
mentionedInfo	cn_rongcloud_im_unity.RCIMMessage
messageId	cn_rongcloud_im_unity.RCIMMessage
messageType	cn_rongcloud_im_unity.RCIMMessage
messageUId	cn_rongcloud_im_unity.RCIMMessage
offLine	cn_rongcloud_im_unity.RCIMMessage
pushOptions	cn_rongcloud_im_unity.RCIMMessage
receivedStatus	cn_rongcloud_im_unity.RCIMMessage
receivedTime	cn_rongcloud_im_unity.RCIMMessage
senderUserId	cn_rongcloud_im_unity.RCIMMessage
sentStatus	cn_rongcloud_im_unity.RCIMMessage
sentTime	cn_rongcloud_im_unity.RCIMMessage
targetId	cn_rongcloud_im_unity.RCIMMessage
text	cn_rongcloud_im_unity.RCIMTextMessage
ToString()	cn_rongcloud_im_unity.RCIMTextMessage
userInfo	cn_rongcloud_im_unity.RCIMMessage