    def render(self, mode='human'):
        """Renders the environment.

        The set of supported modes varies per environment. (And some
        environments do not support rendering at all.) By convention,
        if mode is:

        - human: render to the current display or terminal and
          return nothing. Usually for human consumption.
        - rgb_array: Return an numpy.ndarray with shape (x, y, 3),
          representing RGB values for an x-by-y pixel image, suitable
          for turning into a video.
        - ansi: Return a string (str) or StringIO.StringIO containing a
          terminal-style text representation. The text can include newlines
          and ANSI escape sequences (e.g. for colors).

        Note:
            Make sure that your class's metadata 'render.modes' key includes
              the list of supported modes. It's recommended to call super()
              in implementations to use the functionality of this method.

        Args:
            mode (str): the mode to render with
            close (bool): close all open renderings

        Example:

        class MyEnv(Env):
            metadata = {'render.modes': ['human', 'rgb_array']}

            def render(self, mode='human'):
                if mode == 'rgb_array':
                    return np.array(...) # return RGB frame suitable for video
                elif mode is 'human':
                    ... # pop up a window and render
                else:
                    super(MyEnv, self).render(mode=mode) # just raise an exception
        """
        raise NotImplementedError
Renders the environment.

The set of supported modes varies per environment. (And some
environments do not support rendering at all.) By convention,
if mode is:

- human: render to the current display or terminal and
return nothing. Usually for human consumption.
- rgb_array: Return an numpy.ndarray with shape (x, y, 3),
representing RGB values for an x-by-y pixel image, suitable
for turning into a video.
- ansi: Return a string (str) or StringIO.StringIO containing a
terminal-style text representation. The text can include newlines
and ANSI escape sequences (e.g. for colors).

Note:
Make sure that your class's metadata 'render.modes' key includes
the list of supported modes. It's recommended to call super()
in implementations to use the functionality of this method.

Args:
mode (str): the mode to render with
close (bool): close all open renderings

Example:

class MyEnv(Env):
metadata = {'render.modes': ['human', 'rgb_array']}

def render(self, mode='human'):
if mode == 'rgb_array':
return np.array(...) # return RGB frame suitable for video
elif mode is 'human':
... # pop up a window and render
else:
super(MyEnv, self).render(mode=mode) # just raise an exception
softlearning/environments/adapters/softlearning_env.py