How to migrate composite index to lb4?

[A-Corregidor]

Hi there!
I can't find on docs how to create a composite index, using lb4 + MySQL connector.
The Lb3 interface doesn't seem to work.

I've tried those structures, but doesn't work either:

@model({
	indexes: {
		uniqueIndex: {
			keys: {
				identificationNumber: 1,
				name: 1,
			},
			options: {
				unique: true,
			},
		},
	},
})


@model({
	indexes: {
		unique: {
			properties: {
				resource: 1,
				scope: 1,
			},
		},
	},
})

How can it be made?