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from typing import overload, TypeVar
import act4e_interfaces as I
A = TypeVar("A")
B = TypeVar("B")
C = TypeVar("C")
class MyFiniteMapOperations(I.FiniteMapOperations):
@overload
def identity(self, s: I.FiniteSet[A]) -> I.FiniteMap[A, A]:
...
@overload
def identity(self, s: I.Setoid[A]) -> I.Mapping[A, A]:
...
def identity(self, s: I.Setoid[A]) -> I.Mapping[A, A]:
raise NotImplementedError()
def compose(self, f: I.FiniteMap[A, B], g: I.FiniteMap[B, C]) -> I.FiniteMap[A, C]:
raise NotImplementedError()
def as_relation(self, f: I.FiniteMap[A, B]) -> I.FiniteRelation[A, B]:
raise NotImplementedError()
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