How to disable a date type field?

Hello, I'm trying to disable a date input for the editor dialog, but I haven't been able to achieve it.
I tried the following:

{
  key: "start",
  type: "date",
  label: "Inicio",
  disabled: true
}

or this:

{
  key: "start",
  type: "date",
  label: "Inicio",
  config: {
    disabled: true
  },
}

but neither of them works.
Thanks for your help