{ return NS_ERROR_NOT_IMPLEMENTED; }
{ if (!mIsPositioned) return NS_ERROR_NOT_INITIALIZED; if (!IsIncreasing(mStartParent, mStartOffset, mEndParent, aEndOffset)) return NS_ERROR_ILLEGAL_VALUE;  mEndOffset = aEndOffset; return NS_OK; }
nsresult nsRange::SetEndOffset(PRInt32 aEndOffset){ return NS_ERROR_NOT_IMPLEMENTED; }