def intersect_line_line(v1: 'mathutils.Vector', v2: 'mathutils.Vector', v3:
    'mathutils.Vector', v4: 'mathutils.Vector'):
    """Returns a tuple with the points on each line respectively closest to the other. 

    :param v1: First point of the first line 
    :type v1: 'mathutils.Vector'
    :param v2: Second point of the first line 
    :type v2: 'mathutils.Vector'
    :param v3: First point of the second line 
    :type v3: 'mathutils.Vector'
    :param v4: Second point of the second line 
    :type v4: 'mathutils.Vector'
    """
    pass
