inline nsString& nsHTMLValue::GetStringValue(nsString& aBuffer) const
inline nsAWritableString& nsHTMLValue::GetStringValue(nsAWritableString& aBuffer) const
inline nsString& nsHTMLValue::GetStringValue(nsString& aBuffer) const{  NS_ASSERTION((mUnit == eHTMLUnit_String) || (mUnit == eHTMLUnit_ColorName) ||               (mUnit == eHTMLUnit_Null), "not a string value");  aBuffer.SetLength(0);  if (((mUnit == eHTMLUnit_String) || (mUnit == eHTMLUnit_ColorName)) &&       (nsnull != mValue.mString)) {    aBuffer.Append(mValue.mString);  }  return aBuffer;}