coinbase.go
func (c Client) GetOrder(id string) (*order, error) {
	holder := orderHolder{}
	if err := c.Get("orders/"+id, nil, &holder); err != nil {
		return nil, err
	}
	if err := checkApiErrors(holder.response, "GetOrder"); err != nil {
		return nil, err
	}
	return &holder.Order, nil
}
func (c Client) GetOrder(id string) (*order, error) {
	holder := orderHolder{}
	if err := c.Get("orders/"+id, nil, &holder); err != nil {
		return nil, err
	}
	if err := checkApiErrors(holder.response, "GetOrder"); err != nil {
		return nil, err
	}
	return &holder.Order, nil
}
// GetOrder gets a particular order referenced by id