Check if operation_type exists in AbstractItemNormalizer
Check if operation_type exists in AbstractItemNormalizer

soyuka/DunglasApiBundle,api-platform/core,jdeniau/DunglasApiBundle,api-platform/core,jdeniau/DunglasApiBundle,vincentchalamon/core,meyerbaptiste/core,meyerbaptiste/core,teohhanhui/api-platform-core,teohhanhui/DunglasApiBundle,teohhanhui/api-platform-core,vincentchalamon/core,soyuka/core,vincentchalamon/core,meyerbaptiste/core,jdeniau/DunglasApiBundle,teohhanhui/api-platform-core,meyerbaptiste/core,jdeniau/DunglasApiBundle,ahlee2326/DunglasApiBundle,soyuka/core,teohhanhui/api-platform-core,soyuka/core,api-platform/core,leesiongchan/DunglasApiBundle,vincentchalamon/core,soyuka/core,api-platform/core