working out the type information of `urlValue` type.

url.yaml

#@ load("@ytt:url", "url")
#@ load("@ytt:struct", "struct")

---

#@ def yamlfragment():
foo: bar
#@ end


yaml_fragment:
  type: #@ "ytt.yamlfragment" or type(yamlfragment())

#@ x = url.parse("https://bob:secret@example.com")
url_value:
  type: #@ "@ytt:url.URL" or type(x)
  truth: #@ x == True
  string: #@ str(x)
  as_string: #@ x.string()
  user:
    username: #@ x.user.name
    password: #@ x.user.password

struct_value:
  type: #@ "ytt.struct" or type(x)
  truth: #@ x == True
  string: #@ str(x)
  as_string: #@ x.string()