gistfile1.txt

...
uint256 constant maxLimit = 20;

 function fundraisersCount() public view returns (uint256) {
    return _fundraisers.length;
  }

function fundraisers(uint256 limit, uint256 offset)
    public
    view
    returns (Fundraiser[] memory coll)
  {
    require(offset <= fundraisersCount(), 'offset out of bounds');

    uint256 size = fundraisersCount() - offset;
    size = size < limit ? size : limit;
    size = size < maxLimit ? size : maxLimit;
    coll = new Fundraiser[](size);

    for (uint256 i = 0; i < size; i++) {
      coll[i] = _fundraisers[offset + i];
    }

    return coll;
  }
  ...