def __init__(self, name, init_config, agentConfig, instances=None):
        AgentCheck.__init__(self, name, init_config, agentConfig, instances=instances)
        if instances is not None and len(instances) > 1:
            raise Exception("BTRFS check only supports one configured instance.")
dataset/ETHPy150Open serverdensity/sd-agent/checks.d/btrfs.py/BTRFS.__init__/original