Important note missing from WireSend wiki page

In the source code of the Wire library (spamproofwiki:// it is mentioned in a header comment that send() "must be called in: slave tx event callback" but the WireSend page of the Arduino wiki (spamproofwiki:// makes no mention of it. Please add a comment to that page about this, because it can cause a serious headache to debug a sketch without this knowledge.