How to use the pygmsh.opencascade.volume_base.VolumeBase function in pygmsh

def test_translation3d():
    """Translation of a volume object."""
    geom = pygmsh.opencascade.Geometry(0.2, 0.2)
    ball = geom.add_ball([0, 0, 0], 1)
    ball2 = geom.add_ball([1.5, 0, 0], 1)
    geom.translate(ball, [1.5, 0, 0])
    geom.boolean_union([ball2, ball])

    mesh = pygmsh.generate_mesh(geom)
    surf = 4 / 3 * np.pi
    assert isinstance(ball, pygmsh.opencascade.volume_base.VolumeBase)
    assert isinstance(ball, pygmsh.built_in.volume_base.VolumeBase)

    assert np.abs(compute_volume(mesh) - surf) < 2e-2 * surf
    return

from .volume_base import VolumeBase


class Cone(VolumeBase):
    """
    Creates a cone.

    center : array-like[3]
        The 3 coordinates of the center of the first circular face.
    axis : array-like[3]
        The 3 components of the vector defining its axis.
    radius0 : float
        Radius of the first circle.
    radius1 : float
        Radius of the second circle.
    alpha : float
        Angular opening of the the Cone.
    """

    def __init__(self, center, axis, radius0, radius1, alpha=None, char_length=None):

#    'Delete;' if delete_first else '',
            #    legal_dim_types[dim],
            #    ';'.join(e.id for e in tool_entities),
            #    'Delete;' if delete_other else ''
            #    ))
            "%(name)s[] = %(op)s{ %(ientities)s %(idelete)s } { %(tentities)s %(tdelete)s};"
            % {
                "name": name,
                "op": operation,
                "ientities": formatted_input_entities,
                "idelete": input_delete,
                "tentities": formatted_tool_entities,
                "tdelete": tool_delete,
            }
        )
        mapping = {"Line": None, "Surface": SurfaceBase, "Volume": VolumeBase}
        return mapping[legal_dim_types[dim]](id0=name, is_list=True)

from .volume_base import VolumeBase


class Box(VolumeBase):
    """
    Creates a box.

    Parameters
    ----------
    x0 : array-like[3]
        List containing the x, y, z values of the start point.
    extends : array-like[3]
        List of the 3 extents of the box edges.
    char_length : float
        Characteristic length of the mesh elements of this polygon.
    """

    def __init__(self, x0, extents, char_length=None):
        super().__init__()

from .volume_base import VolumeBase


class Wedge(VolumeBase):
    """
    Creates a right angular wedge.

    x0 : array-like[3]
        The 3 coordinates of the right-angle point.
    extends : array-like[3]
        List of the 3 extends of the box edges.
    top_extend : float
        Defines the top X extent.
    char_length : float
        Characteristic length of the mesh elements of this polygon.
    """

    def __init__(self, x0, extents, top_extent=None, char_length=None):
        super().__init__()

from .volume_base import VolumeBase


class Torus(VolumeBase):
    """
    Creates a torus.

    center : array-like[3]
        The 3 coordinates of its center.
    radius0 : float
        Inner radius.
    radius1 : float
        Outer radius.
    alpha : float
        Defines the angular opening.
    char_length : float
        Characteristic length of the mesh elements of this polygon.
    """

    def __init__(self, center, radius0, radius1, alpha=None, char_length=None):

from .volume_base import VolumeBase


class Ball(VolumeBase):
    """
    Creates a sphere.

    Parameters
    ----------
    center: array-like[3]
        Center of the ball.
    radius: float
        Radius of the ball.
    x0: float
        If specified and `x0 > -1`, the ball is cut off at `x0*radius`
        parallel to the y-z plane.
    x1: float
        If specified and `x1 < +1`, the ball is cut off at `x1*radius`
        parallel to the y-z plane.
    alpha: float

from .volume_base import VolumeBase


class Cylinder(VolumeBase):
    """
    Creates a cylinder.

    Parameters
    ----------
    x0 : array-like[3]
        The 3 coordinates of the center of the first circular face.
    axis : array-like[3]
        The 3 components of the vector defining its axis.
    radius : float
        Radius value of the cylinder.
    angle : float
        Angular opening of the cylinder.
    char_length : float
        Characteristic length of the mesh elements of this polygon.
    """