code: def test_2D_pathway_to_loads(self):
      self.pA.set_pos(self.pO, -(self.N.x + self.N.y))
      self.pB.set_pos(
          self.pO, cos(self.q) * self.N.x - (sin(self.q) + 1) * self.N.y
      )
      self.pI.set_pos(
          self.pO, sin(self.q) * self.N.x + (cos(self.q) - 1) * self.N.y
      )
      pathway = ObstacleSetPathway(self.pO, self.pA, self.pB, self.pI)
      pO_pA_force_vec = sqrt(2) / 2 * (self.N.x + self.N.y)
      pA_pB_force_vec = (
          -sqrt(2 * cos(self.q) + 2) / 2 * self.N.x
          + sqrt(2)
          * sin(self.q)
          / (2 * sqrt(cos(self.q) + 1))
          * self.N.y
      )
      pB_pI_force_vec = (
          cos(self.q + pi / 4) * self.N.x
          - sin(self.q + pi / 4) * self.N.y
      )
      expected = [
          Force(self.pO, self.F * pO_pA_force_vec),
          Force(self.pA, -self.F * pO_pA_force_vec),
          Force(self.pA, self.F * pA_pB_force_vec),
          Force(self.pB, -self.F * pA_pB_force_vec),
          Force(self.pB, self.F * pB_pI_force_vec),
          Force(self.pI, -self.F * pB_pI_force_vec),
      ]
      assert _simplify_loads(pathway.to_loads(self.F)) == expected
  
imports: import pytest
  from sympy import Rational, Symbol, cos, pi, sin, sqrt
  from sympy.physics.mechanics import Force, LinearPathway, ObstacleSetPathway, PathwayBase, Point, ReferenceFrame, WrappingCylinder, WrappingGeometryBase, WrappingPathway, WrappingSphere, dynamicsymbols
  from sympy.simplify.simplify import simplify
label_desc: Use image node_id 13 for calling the TestObstacleSetPathway obj's underlying member method code with example usage: obj.test_2D_pathway_to_loads() without return types