private void AddAdjacentPixelsOnY(ICollection <MapPixel> adjacentPixels, ITwoDimensionalCoordinate coordinate)
{
var currentCoordinate = new MapCoordinate(coordinate.GetX(), coordinate.GetY());
for (var yOff = -1; yOff <= 1; yOff += 2)
{
currentCoordinate.SetY(coordinate.GetY() + yOff);
if (CoordinateIsInBounds(coordinate))
{
adjacentPixels.Add(_map[currentCoordinate.GetX(), currentCoordinate.GetY()]);
}
}
}
