code: def build_guidance(self, cfg):
      self.guidance = self.from_config_dict(cfg)
      self.guidance.eval()
      for p in self.guidance.parameters():
          p.requires_grad = False
  
file_path: NeMo/nemo/collections/multimodal/models/nerf/txt2nerf_base.py
imports: from nemo.collections.multimodal.models.nerf.base import NerfModelBase
label_desc: Use image node_id 3 for calling the Txt2NerfBase obj's underlying member method code with example usage: obj.build_guidance(cfg) without return types