'nth_coord = along which coordinate value varies.
nth_coord = 0 ->  x axis, nth_coord = 1 -> y axis'

def __init__(self, grid_helper, side, nth_coord_ticks=None):

    (value, nth_coord) = grid_helper.get_data_boundary(side)
    super(FixedAxisArtistHelper, self).__init__(grid_helper, nth_coord, value, axis_direction=side)
    if (nth_coord_ticks is None):
        nth_coord_ticks = nth_coord
    self.nth_coord_ticks = nth_coord_ticks
    self.value = value
    self.grid_helper = grid_helper
    self._side = side
