Symfony version(s) affected: 4.3.2

Description
Using camelCase, with an attribute $aFooBar, naming the getter/setter getAFooBar()/setAFooBar() returns the property name as AFooBar instead of aFooBar.

I'm not sure if this is a bug or intended behavior, but it seems weird that the second character's case dictates the first character case, as:

• getAFooBar returns the property name as AFooBar (1&2 uppercase => 1&2 uppercase)
• getAfooBar returns the property name as afooBar (1 uppercase & 2 lowercase => 1&2 lowercase)

Found it out the hard way through api-platform/core#2941

Generating the getter with make:entity from the attribute $aFooBar generates getAFooBar() which in turn gives the property name AFooBar.

How to reproduce
Create an entity such as the one below and get its properties.

// ./src/Entity/UDemandeur.php

namespace App\Entity;

use ApiPlatform\Core\Annotation\ApiProperty;
use ApiPlatform\Core\Annotation\ApiResource;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ApiResource()
 * @ORM\Entity(repositoryClass="App\Repository\UDemandeurRepository")
 * @ORM\Table(name="U_DEMANDEUR")
 */
class UDemandeur {
    /**
     * @ApiProperty(identifier=true)
     * @ORM\Id()
     * @ORM\Column(type="string", name="U_DEMANDEURID", unique=true, length=255)
     */
    private $uDemandeurId;

    public function getUDemandeurId(): ?string
    {
        return $this->uDemandeurId;
    }
}