func (c *FakeClient) Update(instanceID string, agentSettings registry.AgentSettings) error {
	c.UpdateCalled = true
	c.UpdateSettings = agentSettings
	return c.UpdateErr
}
func (c *FakeClient) Update(instanceID string, agentSettings registry.AgentSettings) error {
	c.UpdateCalled = true
	c.UpdateSettings = agentSettings
	return c.UpdateErr
}
// Update updates the agent settings for a given instance ID.