docs: def solve(self, t0, y0, h=1.0, T=None, g=None, tol=None,
                integrator='dopri5', step=False, relax=False, **kwargs):
          r"""
          Solve the IVP by integrating the ODE given some initial condition.
  
          Parameters
          ----------
          t0 : float
              Initial condition for the independent variable.
          y0 : array_like (float, shape=(n,))
              Initial condition for the dependent variables.
          h : float, optional(default=1.0)
              Step-size for computing the solution. Can be positive or negative
              depending on the desired direction of integration.
          T : int, optional(default=None)
              Terminal value for the independent variable. One of either `T`
              or `g` must be specified.
          g : callable ``g(t, y, f_args)``, optional(default=None)
              Provides a stopping condition for the integration. If specified
              user must also specify a stopping tolerance, `tol`.
          tol : float, optional (default=None)
              Stopping tolerance for the integration. Only required if `g` is
              also specifed.
          integrator : str, optional(default='dopri5')
              Must be one of 'vode', 'lsoda', 'dopri5', or 'dop853'
          step : bool, optional(default=False)
              Allows access to internal steps for those solvers that use adaptive
              step size routines. Currently only 'vode', 'zvode', and 'lsoda'
              support `step=True`.
          relax : bool, optional(default=False)
              Currently only 'vode', 'zvode', and 'lsoda' support `relax=True`.
          **kwargs : dict, optional(default=None)
              Dictionary of integrator specific keyword arguments. See the
              Notes section of the docstring for `scipy.integrate.ode` for a
              complete description of solver specific keyword arguments.
  
          Returns
          -------
          solution: ndarray (float)
              Simulated solution trajectory.
  
          """
          self._initialize_integrator(t0, y0, integrator, **kwargs)
  
          if (g is not None) and (tol is not None):
              soln = self._integrate_variable_trajectory(h, g, tol, step, relax)
          elif T is not None:
              soln = self._integrate_fixed_trajectory(h, T, step, relax)
          else:
              mesg = "Either both 'g' and 'tol', or 'T' must be specified."
              raise ValueError(mesg)
  
          return soln