docs: def get_function_policy(self, function_name):
          # type: (str) -> Dict[str, Any]
          """Return the function policy for a lambda function.
  
          This function will extract the policy string as a json document
          and return the json.loads(...) version of the policy.
  
          """
          client = self._client('lambda')
          try:
              policy = client.get_policy(FunctionName=function_name)
              return json.loads(policy['Policy'])
          except client.exceptions.ResourceNotFoundException:
              return {'Statement': []}