src/Entity/OrganizationReference.php
protected function proxy($method)
    {
        if (!$this->hasAssociation()) {
            return $this;
        }

        $args = array_slice(func_get_args(), 1);

        $return = call_user_func_array(array($this->_organization, $method), $args);

        return ($return === $this->_organization) ? $this : $return;
    }
protected function proxy($method)
    {
        if (!$this->hasAssociation()) {
            return $this;
        }

        $args = array_slice(func_get_args(), 1);

        $return = call_user_func_array(array($this->_organization, $method), $args);

        return ($return === $this->_organization) ? $this : $return;
    }
Executes a proxy call to the associated organization entity.

Does nothing, if no organization is available.

Call it like:
<pre>
$this->proxy($method[, $arg1[, $arg2[, ...]]]);
</pre>

@param $method

@return self|mixed