def subscription_info(self, subscription_id: int):
    result = []
    for s in self.subscriptions:
        if (s.id == subscription_id):
            result.append(repr(s))
    for c in self.customers:
        if (c.id == subscription_id):
            result.append(repr(c))
    for t in self.trainers:
        if (t.id == subscription_id):
            result.append(repr(t))
    for e in self.equipment:
        if (e.id == subscription_id):
            result.append(repr(e))
    for p in self.plans:
        if (p.id == subscription_id):
            result.append(repr(p))
    return '\n'.join(result)
def subscription_info(self, subscription_id: int):
    result = []
    for s in self.subscriptions:
        if (s.id == subscription_id):
            result.append(repr(s))
    for c in self.customers:
        if (c.id == subscription_id):
            result.append(repr(c))
    for t in self.trainers:
        if (t.id == subscription_id):
            result.append(repr(t))
    for e in self.equipment:
        if (e.id == subscription_id):
            result.append(repr(e))
    for p in self.plans:
        if (p.id == subscription_id):
            result.append(repr(p))
    return '\n'.join(result)