Overwrite the method in v-date-picker

[obelisk0114]

Hello,

Since vuetify doesn't support keyboard access in year button in v-date-picker, I need to add keyboard control in that part. So I want to add tabindex=0 and related keypress eventListener to the year items, which are <li> elements.

I find that I can overwrite genYearItem (year: number): VNode in VDatePickerYears.ts to add tabindex and event listener.
I also find a link to extend vuetify component.

However, the component, VBtn, in the example is a simple component with only one file.
VDatePicker is a complex one with many files doing their own jobs.

Does anyone know how to overwrite genYearItem (year: number): VNode method?