Fixes problem with potential null values coming from nested properties.
Fixes problem with potential null values coming from nested properties.

fazland/FazlandElasticaBundle,peterkokot/FOSElasticaBundle,alekitto/FazlandElasticaBundle,fazland/FazlandElasticaBundle,Exercise/FOQElasticaBundle,alekitto/FazlandElasticaBundle,ramuss/FazlandElasticaBundle,ramuss/FazlandElasticaBundle