public function getSourceChildPropertiesToBeConvertedReturnsAllPropertiesExceptTheIdentityProperty()
{
$source = ['k1' => 'v1', '__identity' => 'someIdentity', 'k2' => 'v2'];
$expected = ['k1' => 'v1', 'k2' => 'v2'];
$this->assertEquals($expected, $this->converter->getSourceChildPropertiesToBeConverted($source));
}