class_docstr: Abstract base class for all actuator classes to inherit from.
  
  Notes
  =====
  
  Instances of this class cannot be directly instantiated by users. However,
  it can be used to created custom actuator types through subclassing.
docstr: Loads required by the equations of motion method classes.
  
  Explanation
  ===========
  
  ``KanesMethod`` requires a list of ``Point``-``Vector`` tuples to be
  passed to the ``loads`` parameters of its ``kanes_equations`` method
  when constructing the equations of motion. This method acts as a
  utility to produce the correctly-structred pairs of points and vectors
  required so that these can be easily concatenated with other items in
  the list of loads and passed to ``KanesMethod.kanes_equations``. These
  loads are also in the correct form to also be passed to the other
  equations of motion method classes, e.g. ``LagrangesMethod``.
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code: def to_loads(self):
      """Loads required by the equations of motion method classes.
  
      Explanation
      ===========
  
      ``KanesMethod`` requires a list of ``Point``-``Vector`` tuples to be
      passed to the ``loads`` parameters of its ``kanes_equations`` method
      when constructing the equations of motion. This method acts as a
      utility to produce the correctly-structred pairs of points and vectors
      required so that these can be easily concatenated with other items in
      the list of loads and passed to ``KanesMethod.kanes_equations``. These
      loads are also in the correct form to also be passed to the other
      equations of motion method classes, e.g. ``LagrangesMethod``.
  
      """
      pass
  
imports: from abc import ABC, abstractmethod
  from sympy import S, sympify
  from sympy.physics.mechanics.joint import PinJoint
  from sympy.physics.mechanics.loads import Torque
  from sympy.physics.mechanics.pathway import PathwayBase
  from sympy.physics.mechanics.rigidbody import RigidBody
  from sympy.physics.vector import ReferenceFrame, Vector
label_desc: Use image node_id 2 for calling the ActuatorBase obj's underlying member method code with example usage: obj.to_loads() without return types