code: def __init__(
      self,
      dev_head_ts,
      offsets,
      info,
      trans,
      src,
      bem,
      mindist,
      n_jobs,
      meeg_picks,
      forward=None,
      use_cps=True,
  ):
      self.idx = 0
      self.offsets = offsets
      self.use_cps = use_cps
      self.iter = iter(
          _iter_forward_solutions(
              info,
              trans,
              src,
              bem,
              dev_head_ts,
              mindist,
              n_jobs,
              forward,
              meeg_picks,
          )
      )
  
imports: import os
  from collections.abc import Iterable
  from pathlib import Path
  import numpy
  from .._fiff.constants import FIFF
  from .._fiff.meas_info import Info
  from .._fiff.pick import pick_channels, pick_channels_forward, pick_info, pick_types
  from .._ola import _Interp2
  from ..bem import fit_sphere_to_headshape, make_sphere_model, read_bem_solution
  from ..chpi import _get_hpi_initial_fit, get_chpi_info, head_pos_to_trans_rot_t, read_head_pos
  from ..cov import Covariance, make_ad_hoc_cov, read_cov
  from ..event import _get_stim_channel
  from ..forward import _compute_forwards, _magnetic_dipole_field_vec, _merge_fwds, _prep_meg_channels, _prepare_for_forward, _stc_src_sel, _to_forward_dict, _transform_orig_meg_coils, convert_forward_solution, restrict_forward_to_stc
  from ..io import BaseRaw, RawArray
  from ..source_estimate import _BaseSourceEstimate
  from ..source_space._source_space import _ensure_src, _set_source_space_vertices, setup_volume_source_space
  from ..surface import _CheckInside
  from ..transforms import _get_trans, transform_surface_to
  from ..utils import _check_preload, _pl, _validate_type, check_random_state, logger, verbose
  from .source import SourceSimulator
label_desc: Use image node_id 1 to create a new _SimForwards object  with example: obj = _SimForwards(dev_head_ts, offsets, info, trans, src, bem, mindist, n_jobs, meeg_picks, forward, use_cps)