How to remove a collection element without EntityManager#remove(...) in Doctrine 2?

class EntityA
{
    ...
    /**
     * @var ArrayCollection
     * @ORM\OneToMany(targetEntity="EntityB", mappedBy="entityA", cascade={"persist"}, orphanRemoval=true)
     */
    protected $entityBs;
    ...
    public function removeEntityB(EntityB $entityB)
    {
        $this->entityBs->removeElement($entityB);
        $entityB->setEntityA(null);
        return $this;
    }
    ...
}

class EntityB
{
    ...
    /**
     * @var EntityA
     *
     * @ORM\ManyToOne(targetEntity="EntityA", inversedBy="entityBs")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="entity_a_id", referencedColumnName="id")
     * })
     */
    protected $entityA;
    ...
    /**
     * @param EntityA $entityA
     * @return EntityB
     */
    public function setEntityA(EntityA $entityA = null)
    {
        $this->entityA = $entityA;
        return $this;
    }
    ...
}

public function setEntityBs($entityBs)
{
    $this->removeEntityBs();
    $this->entityBs = new ArrayCollection([]);
    /** @var EntityB $entityB */
    foreach ($entityBs as $entityB) {
        $this->addEntityB($entityB);
    }
    return $this;
}
public function removeEntityBs()
{
    foreach ($this->getEntityBs() as $entityB) {
        $this->removeEntityB($entityB);
    }
    return $this;
}

public function setEntityBs($entityBs)
{
    $this->removeEntityBsNotInList($entityBs);
    $this->entityBs = new ArrayCollection([]);
    /** @var EntityB $entityB */
    foreach ($entityBs as $entityB) {
        $this->addEntityB($entityB);
    }
    return $this;
}
private function removeEntityBsNotInList($entityBs)
{
    foreach ($this->getEntityBs() as $entityB) {
        if ($entityBs->indexOf($entityB) === false) {
            $this->removeEntityB($entityB);
        }
    }
}