{ return NS_ERROR_NOT_IMPLEMENTED; }
{ if (!mIsPositioned) return NS_ERROR_NOT_INITIALIZED;  if (aToStart) { NS_IF_RELEASE(mEndParent); NS_IF_ADDREF(mStartParent); mEndParent = mStartParent; mEndOffset = mStartOffset; return NS_OK; } else { NS_IF_RELEASE(mStartParent); NS_IF_ADDREF(mEndParent); mStartParent = mEndParent; mStartOffset = mEndOffset; return NS_OK; } }
nsresult nsRange::Collapse(PRBool aToStart){ return NS_ERROR_NOT_IMPLEMENTED; }