Could the method AbstractResource::set() return $this?

vendor/m1/vars/src/Resource/AbstractResource.php

/**
     * Object oriented set access for the array
     *
     * @param string $key The key to set the value for
     * @param string $value The value to set
     */
    public function set($key, $value)
    {
        $this->internalSet($this->content, $key, $value);
    }