# convert method

Uint8List convert (String input, [ int start = 0, int end ])
override

Decodes the characters of `input` from `start` to `end` as base64.

If `start` is omitted, it defaults to the start of `input`. If `end` is omitted, it defaults to the end of `input`.

The returned Uint8List contains exactly the decoded bytes, so the Uint8List.length is precisely the number of decoded bytes. The Uint8List.buffer may be larger than the decoded bytes.

## Implementation

    Uint8List convert(String input, [int start = 0, int end]) {
      end = RangeError.checkValidRange(start, end, input.length);
      if (start == end) return Uint8List(0);
      var decoder = _Base64Decoder();
      var buffer = decoder.decode(input, start, end);
      decoder.close(input, end);
      return buffer;
    }