'Initialize new instance.
Args:
quota_manager: quota manager to use for quota operations as QuotaManager.
bucket: quota bucket name as string.
batch_size: batch size for quota consuming as int.'

def __init__(self, quota_manager, bucket, batch_size):

    self.quota_manager = quota_manager
    self.batch_size = batch_size
    self.bucket = bucket
    self.quota = 0
