sideAt method

Side? sideAt(
  1. Square square
)

Gets the Side at this Square, if any.

Implementation

Side? sideAt(Square square) {
  if (bySide(Side.white).has(square)) {
    return Side.white;
  } else if (bySide(Side.black).has(square)) {
    return Side.black;
  } else {
    return null;
  }
}