Here is the example of what I want to do:

const obj = {
  parent1: {
    child1: "child-key1",
    child2: "child-key2",
  },
  parent2: {
    child3: "child-key3",
    child4: "child-key4",
  }
} as const

const func = (
  parentKeyName : keyof typeof obj,
  childKeyName: keyof typeof obj[parentKeyName]
) => {}

// When I fill first arg, I want code completion to suggest me the list of keys for second arg
func("parent2", "child3") 

But the definition of ‘func’ above gives me an error:

Is there any way to use first arg to narrow the type of second arg?