How to impliment getter/setter for each button’s value inside vuetify v-btn-toggle?

I have a vuetify v-btn-toggle like this:

    <v-btn-toggle
      v-model="toggle_values"
      dense
      multiple
    >
      <v-btn value="A">
        A
      </v-btn>
      <v-btn value="B">
        B
      </v-btn>
      <v-btn value="C">
        C
      </v-btn>
    </v-btn-toggle>

But the binding v-model is an array. How could I trigger individual toggled event for buttons A, B, C like this:

data() {
  return { toggle_values: [] }
},
computed: {
  stateA: {
    get() {
      // get A value from other place
    },
    set(isPressed) {
      // do something on A value changed
    }
  },
  stateB: {
    get() {
    },
    set(isPressed) {
    }
  },
  stateC: {
    get() {
    },
    set(isPressed) {
    }
  },
}