func (c *Client) SetEndpoints(eps ...string) {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.cfg.Endpoints = eps
	c.resolverGroup.SetEndpoints(eps)
}
func (c *Client) SetEndpoints(eps ...string) {
	c.mu.Lock()
	defer c.mu.Unlock()
	c.cfg.Endpoints = eps
	c.resolverGroup.SetEndpoints(eps)
}
// SetEndpoints updates client's endpoints.