code: def _check_fixed_ori(inst):
      """Check if inverse or forward was computed for fixed orientations."""
      is_fixed = inst["source_ori"] != FIFF.FIFFV_MNE_FREE_ORI
      return is_fixed
  
imports: from copy import deepcopy
  import numpy
  from mne.minimum_norm.inverse import InverseOperator
  from .._fiff.constants import FIFF
  from .._fiff.pick import pick_channels_forward
  from ..evoked import EvokedArray
  from ..forward.forward import Forward, convert_forward_solution
  from ..label import Label
  from ..source_estimate import _get_src_type, _make_stc, _prepare_label_extraction
  from ..source_space._source_space import SourceSpaces, _get_vertno
  from ..utils import _validate_type, logger, verbose
  from .inverse import apply_inverse
label_desc: Use image node_id 12 for calling a global function with example usage: _check_fixed_ori(inst) and returns: is_fixed