How to validator a struct that overiding field in embedding struct

[ghost]

Package version v10:

Question

I want to validate the B struct, when T2 is not empty can pass the vaildate . the 'T1' in A is ignored.

type A struct {
	T1 string `validate:"required"`
	T2 string `validate:"required"`
}
type B struct {
	T1 string // is not required
	A
}
// In this case, json works good. sometimes I need to change the A sturct.

I try the 'structonly',but does't work.
I need your guidance.

I'm sorry my English is poor
At last,Thank you for your work.