public function testApiRemoveSolver_RemovesHandler_WhenHandlerDoesExist()
{
$super = $this->createSupervisor([], [Exception::class => $solver = $this->createSolver()]);
$this->assertTrue($super->existsSolver(Exception::class));
$super->removeSolver(Exception::class);
$this->assertFalse($super->existsSolver(Exception::class));
}