def get_labels_for_twin() -> dict:
    """
    Get labels for hexagonal twin.

    Returns:
        dict: Contain keys and qpoints.

    Examples:
        Labels and qpoints for twin is as bellow.

        >>> label_qpoints = {
                'GAMMA': [0, 0, 0],
                'M_1'  : [1/2, 0, 0],
                'M_2'  : [-1/2, 1/2, 0],
                'K_1'  : [1/3, 1/3, 0],
                'K_2'  : [-1/3, 2/3, 0],
                'A'    : [0, 0, 1/2],
                'L_1'  : [1/2, 0, 1/2],
                'L_2'  : [-1/2, 1/2, 1/2],
                'H_1'  : [1/3, 1/3, 1/2],
                'H_2'  : [-1/3, 2/3, 1/2],
                }
    """
    label_qpoints = {
        'GAMMA': [0, 0, 0],
        'M_1'  : [1/2, 0, 0],
        'M_2'  : [-1/2, 1/2, 0],
        'K_1'  : [1/3, 1/3, 0],
        'K_2'  : [-1/3, 2/3, 0],
        'A'    : [0, 0, 1/2],
        'L_1'  : [1/2, 0, 1/2],
        'L_2'  : [-1/2, 1/2, 1/2],
        'H_1'  : [1/3, 1/3, 1/2],
        'H_2'  : [-1/3, 2/3, 1/2],
    }
    return label_qpoints