class_docstr: A callable that "updates" an environment.
  
  Implementors of this interface can be called on environments to update
  them. The passed in environment should then be ignored, and the returned
  one used instead.
  
  Since no new environment needs to be passed in, this type can also
  be used to construct new environments.
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docstr: Update an environment.
  
  Note that this implementation does nothing.
  
  Args:
      old_env (Environment or None): Previous environment. Should not be
          used after being passed in, and should not be closed.
  
  Returns:
      Environment: The new, updated environment.
docstr_tok: ["Update","an","environment",".","Note","that","this","implementation","does","nothing",".","Args",":","old_env","(","Environment","or","None",")",":","Previous","environment",".","Should","not","be","used","after","being","passed","in",",","and","should","not","be","closed",".","Returns",":","Environment",":","The","new",",","updated","environment","."]
code: def __call__(self, old_env=None):
      """Update an environment.
  
      Note that this implementation does nothing.
  
      Args:
          old_env (Environment or None): Previous environment. Should not be
              used after being passed in, and should not be closed.
  
      Returns:
          Environment: The new, updated environment.
  
      """
      return old_env
  
file_path: garage/src/garage/sampler/env_update.py
imports: import warnings
label_desc: Use image node_id 1 for calling the EnvUpdate obj's underlying member method code with example usage: obj.__call__(old_env) and returns: old_env