PHPStan\Type\CallableType::accepts PHP Method

    public function accepts(Type $type) : bool
    {
        if ($type instanceof self) {
            return true;
        }
        if ($this->isNullable() && $type instanceof NullType) {
            return true;
        }
        if ($type instanceof ArrayType && $type->isPossiblyCallable()) {
            return true;
        }
        if ($type->getClass() === 'Closure') {
            return true;
        }
        return $type instanceof MixedType;
    }