class_docstr: In-house ODE integrator.
  
  Parameters
  ----------
  n_steps : int
      Number of steps to perform.
  step_type : str
      Type of integration step.
      Possible values are `euler`, `rk2`, `rk4`.
  save_result : bool
      If True, result is stored after calling `integrate` or `integrate_t`.
code: def _integrate(self, force, initial_state, end_time=1.0):
      dt = end_time / self.n_steps
      states = [initial_state]
      current_state = initial_state
  
      for i in range(self.n_steps):
          current_state = self._step(
              force=force, state=current_state, time=i * dt, dt=dt
          )
          states.append(current_state)
  
      return states
  
imports: from abc import ABC, abstractmethod
  import scipy
  import geomstats.backend
  import geomstats.integrator
  from geomstats.errors import check_parameter_accepted_values
  from geomstats.numerics._common import result_to_backend_type
label_desc: Use image node_id 6 for calling the GSIVPIntegrator obj's underlying member method code with example usage: obj._integrate(force, initial_state, end_time) and returns: states