Simple Provide And Extract from context

Provide:

ctx = dpi.ProvideWithContext(ctx,
		// eg inject B to A, ServiceB *ServiceB        `inject:"true,lazy"`
		services.NewServiceA(ctx),

		// eg inject A to B, ServiceA *ServiceA        `inject:"true,lazy"`
		services.NewServiceB(ctx),
)

Consume

type ServiceA struct {
	DB       *database.DBConn `inject:"true"`
	ServiceB *ServiceB        `inject:"true,lazy"`
}

func NewServiceA(ctx context.Context) *ServiceA {
	s := &ServiceA{}
	if _, err := dpi.InjectFromContext(ctx, s); err != nil {
		panic(err)
	}

	return s
}