function.js

import {sampleOne} from 'babel-plugin-transform-flow-to-gen/api';

type Person = {
  name: string,
  age: number
}

function setName(person: Person, name: string): Person {
  return {
    ...person,
    name
  };
}

// transform creates a static member that can generate function arguments
const argsGen = setName.asGenerator();

// generate a sample
const args = sampleOne(argsGen);

// then you can use the args to call the function
const newPerson = setName(...args);

console.log(args);
// [{ "name": "fjX1", "age": 0 }, "xfwef"]

console.log(newPerson);
// { "name": "xfwef", "age": 0 }