code: def _linear_pathway_fixture(self):
      self.N = ReferenceFrame("N")
      self.pA = Point("pA")
      self.pB = Point("pB")
      self.pathway = LinearPathway(self.pA, self.pB)
      self.q1 = dynamicsymbols("q1")
      self.q2 = dynamicsymbols("q2")
      self.q3 = dynamicsymbols("q3")
      self.q1d = dynamicsymbols("q1", 1)
      self.q2d = dynamicsymbols("q2", 1)
      self.q3d = dynamicsymbols("q3", 1)
      self.F = Symbol("F")
  
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 5 for calling the TestLinearPathway obj's underlying member method code with example usage: obj._linear_pathway_fixture() without return types