def __init__(self, buffer: ReplayBuffer, sample_size: int = 200) -> None:
        """
        Args:
            buffer: replay buffer
            sample_size: number of experiences to sample at a time
        """
        self.buffer = buffer
        self.sample_size = sample_size

        Args:
            buffer: replay buffer
            sample_size: number of experiences to sample at a time
        
examples/pytorch/domain_templates/reinforce_learn_Qnet.py