class_docstr: Video-text single tower moment retrieval model.
class_docstr_tok: ["Video-text","single","tower","moment","retrieval","model","."]
code: def default_flax_model_config(self) -> ml_collections.ConfigDict:
      return _DEFAULT_UNLOC_CONFIG
  
imports: from typing import Any, Dict, Optional
  import flax.linen
  import jax
  import jax.numpy
  import ml_collections
  from scenic.projects.unloc import action_segmentation_base_model
  from scenic.projects.unloc import encoders
  from scenic.projects.unloc import heads
  from scenic.projects.unloc import moment_retrieval_base_model
  from scenic.projects.unloc import temporal_localization_base_model
  from scenic.projects.unloc import video_text_fusion
label_desc: Use image node_id 2 for calling the UnlocMomentRetrievalModel obj's underlying member method code with example usage: obj.default_flax_model_config() and returns: _DEFAULT_UNLOC_CONFIG