code: def triangular() -> tfp.bijectors.Bijector:
      """
      Returns instance of a (lower) triangular bijector.
      """
      return tfp.bijectors.FillTriangular()
  
file_path: GPflow/gpflow/utilities/bijectors.py
imports: from typing import Optional
  import tensorflow
  import tensorflow_probability
  from check_shapes import check_shapes
  from ..None import config
  from .misc import to_default_float
label_desc: Use image node_id 2 for calling a global function with example usage: triangular() and returns: tfp