NewSingleAllocationBuffer( const nsAReadableString& aReadable, PRUint32 aAdditionalCapacity = 1 )
NewSingleAllocationBuffer( const nsAString& aReadable, PRUint32 aAdditionalCapacity = 1 )
      NewSingleAllocationBuffer( const nsAReadableString& aReadable, PRUint32 aAdditionalCapacity = 1 )        {          typedef Buffer* Buffer_ptr;          return NS_AllocateContiguousHandleWithData(Buffer_ptr(0), aReadable, aAdditionalCapacity);        }