Generic php class builder

[Gashmob]

I have something like that https://psalm.dev/r/86fd897865, but with an abstract class and its children.

<?php

/**
 * @template T of int|bool
 */
class Builder {
    public function __construct(private readonly string $type) {}
    
    /**
     * @return self<int>
     */
    public static function aA(): self { return new self('A'); }
    
    /**
     * @return self<bool>
     */
    public static function aB(): self { return new self('B'); }
    
    /**
     * @return T
     */
    public function build()
    {
        if ($this->type === 'A') return 2;
        if ($this->type === 'B') return true;
        
        throw new \LogicException('');
    }
}

Did someone have an idea how to fix the issues. My idea is that if I call Builder::aB()->build() psalm know that build() returns a boolean