nsCString& operator=( const nsAReadableCString& aReadable )       { Assign(aReadable); return *this; }
nsSubsumeCStr& operator=( const nsSubsumeCStr& aString )              { Assign(aString); return *this; }
  nsCString& operator=( const nsAReadableCString& aReadable )       { Assign(aReadable); return *this; }