def METHOD_NAME(diameter: int, x0: float = 0, y0: float = 0) -> List['TwoDQubit']:
    """Returns a square of TwoDQubit.
    Args:
        diameter: Length of a side of the square.
        x0: x-coordinate of the first qubit.
        y0: y-coordinate of the first qubit.
    Returns:
        A list of TwoDQubits filling in a square grid
    """
    return TwoDQubit.rect(diameter, diameter, x0=x0, y0=y0)