How to add custom methods to a Model?

[DaviidMM]

Using for example a ObjectModel, how can I add method or functions to it?

In the following example, how can I add or create the method getColor() so it returns thecolor property of the object davidm ?

const Person = ObjectModel({
  name: String,
  color: String
})

const davidm = Person({
  name: 'David',
  color: 'red'
})

console.log(davidm.getColor())

Thank you beforehand 😄