Problem with constructor helper in DTO object marked as psalm-immutable.

[mj4444ru]

I'm using a trait in a DTO object marked as psalm-immutable.
With the help of the trait, I initialize the properties of the object, but calling the initializing property's mathod, I get an error:
psalm: UnusedMethodCall: The call to BaseData::importMetaProp is not used.
I also get the PropertyNotSetInConstructor error.

I would like to be able to mark a method as a "constructor". Such methods will not raise an UnusedMethodCall error, and these methods can only be called from a constructor or an object marked as "constructor".

https://psalm.dev/r/6a1fd47226

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/6a1fd47226

<?php

/**
 * @psalm-immutable
 */
trait DTOTrait
{
    protected function importProps(object $data, array $meta): void
    {
        /** @var string|array|null $propName */
        foreach ($meta as $propName) {
            if (is_string($propName)) {
                $this->$propName = $data->$propName;
            } else {
                throw new Exception('Invalid $meta argument format.');
            }
        }
    }
}
    
/**
 * @psalm-immutable
 * @psalm-suppress PropertyNotSetInConstructor
 */
class BaseData
{
    use DTOTrait;

    public string $prop1;
    public string $prop1;

    public function __construct(object $data)
    {
        $this->importProps($data, [
            'prop1',
            'prop2',
        ]);
    }
}

Psalm output (using commit 2a29fd7):

ERROR: UnusedMethodCall - 34:16 - The call to BaseData::importProps is not used