nsString& SetString(const nsString& aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}
nsString& SetString(const PRUnichar* aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}
  nsString& SetString(const nsString& aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}