title: insertAt and removeAt vector methods missing from cs4 but present in documentation
body: <p>I seem to be having some trouble with the vector methods removeAt and insertAt, they are both present in the documentation for as3: </p>
  
  <p>"<a href="https://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/Vector.html#insertAt()" rel="nofollow noreferrer">https://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/Vector.html#insertAt()</a>"</p>
  
  <p>And yet in adobe flash cs4 they are undefined and throw up errors. Does cs4 not have these methods or is the documentation poor?</p>