Maybe(Reused) is somehow wrongly cached

[hmax]

Following case breaks:

from builders.construct import Reused, Maybe, Random
from builders.modifiers import Given, Enabled
from builders.builder import Builder


class A:
    k = Random()


class B:
    a = Maybe(Reused(A), enabled=False)


def test_building():
    a = Builder(A).build()
    b = Builder(B).withA(Enabled(B.a)).withA(Given(B.a, a)).build()
    b = Builder(B).build()
    assert b.a is None

but if you add one more Builder(B).build() before asserting - everything goes ok

[pupssman]

Looks like that is due to the state being preserved withing the Enabled thing.